Take your money out of the bank ASAP.  If you still keep your money in the bank, go there and remove as much as you can while leaving in enough to pay your bills. Although it wasn’t a market collapse in Greece recently, the banks did close and limit ATM withdrawals.  People went for quite some time without being able to access their money, but were able to have a sense of normalcy by transferring money online to pay bills or using their debit cards to make purchases.  Get your cash out. You don’t want to be at the mercy of the banks.
The increase in internet trading also led to the crash of 2000. The internet served an easy access to trading for a lot of traders who lacked the required experience. Their trial and error methods of trading lead to losses in the stock trading market. Another supposed reason is that the research firms had a conflict of interest. The investment bankers had the research firms put not so honest ratings on the stocks, thus leading to an overall loss of wealth in the market.
The month began with more bad news. The Labor Department reported that the economy had lost a staggering 240,000 jobs in October. The AIG bailout grew to $150 billion. Treasury announced it was using part of the $700 billion bailouts to buy preferred stocks in the nations' banks. The Big Three automakers asked for a federal bailout. By November 20, 2008, the Dow had plummeted to 7,552.29, a new low. But the stock market crash of 2008 was not over yet.

The bigger they come, the harder they fall.  Currently, we are in the terminal phase of an “everything bubble” which has had ten years to grow.  It is the biggest financial bubble that our country has ever seen, and experts are warning that when it finally bursts we will experience an economic downturn that is even worse than the Great Depression of the 1930s.  Of course many of us in the alternative media have been warning about what is coming for quite some time, but now even many in the mainstream media have jumped on the bandwagon.  The Economist is one of the most prominent globalist mouthpieces in the entire world, and so I was stunned when I came across one of their articles earlier today that was entitled “Another economic downturn is just a matter of time”.  When the alternative media and globalist media outlets are both preaching economic doom, that is a very clear sign that big trouble is imminent.

Usually, HFT programs and computer trading works without a hitch. But once in a while problems do crop up. Back on Aug. 24, 2015, the United States’ three major stock indexes plunged on the open, but would recover much of their losses by midday. Among the reasons blamed for the dip were market makers and HFT traders. With so many stocks within the S&P 500 failing to open on time, and a number of exchange-traded funds under trading halts, HFTs and other high-speed traders shut down their systems, removing much-needed liquidity from the marketplace and exacerbating the early-day decline.
Neil Kashkari talks extensively about false prophets (Alan Greenspan) and the sources of market bubbles such as $100 barrel oil, and other uncontrollable situations.  He says market bubbles and crashes are very complex and the source is often completely unexpected. Could the oil sheiks take the US economy down again? Could China do it? Is the $20 Trillion debt a threat? Or is just the end of a bull run in the stock market?

As longtime China watchers know, the country’s still-immature markets are in many ways more bubble-prone than their Western counterparts, thanks to heavy involvement from retail investors who often take cues from government policy, rather than quaint notions like earnings. Tanking Chinese stocks—the Shanghai Composite is now down nearly 25% from its January peak—could therefore be taken...
Hi Aaron, so nice to hear from someone from Nebraska. I see how prices are rising fast again this summer. I’m wondering that with few listings, what kind of home would you get if you bought this year? Could you find a real gem? The US economy will grow so prices in Omaha are likely to rise strongly. Soybean prices are way down, there’s a lot of risk for 2018/2019? I suspect rent until you’re sure is the best advice. Good luck with your decision!
Unemployment is near record lows. Corporations are bringing money from offshore accounts back into the U.S. Technology is driving thousands of new innovations. Of course, none of these conditions for prosperity will last forever, and there's certainly pockets of the U.S. still experiencing job loss and poverty. I loath being a cheerleader for stocks or the economy, but it's not as bad as it seems.

Can I guarantee this approach will lead to the best results over the long-term? Of course not. But at least you'll be following a disciplined rational strategy rather than engaging in a never-ending guessing game of trying to decide when to get out of the market (and where to put your money once you do) and then trying to figure out when to get back in. That's a game you can't consistently win.
There are other mitigating factors too such as the strengths in the economy, foreign investors buying property, and rising optimism and confidence since Donald Trump won the election.  At this point, we’re wondering if Obama and Clinton are relieved not to have to face the mess they created? Trump seems to be up to the task and yet, he has purportedly said he would enjoy watching the crash, even if it takes down some of his real estate empire. Is this just a comment on high home prices?
Nintendo portrayed these measures as intended to protect the public against poor-quality games, and placed a golden seal of approval on all licensed games released for the system. Further, Nintendo implemented its proprietary 10NES, a lockout chip which was designed to prevent cartridges made without the chip from being played on the NES. The 10NES lockout was not perfect, as later in the NES's lifecycle methods were found to bypass it, but it did sufficiently allow Nintendo to strengthen its publishing control to avoid the mistakes Atari had made.[51] These strict licensing measures backfired somewhat after Nintendo was accused of trust behavior.[52] In the long run, this pushed many western third-party publishers such as Electronic Arts away from Nintendo consoles, and would actively support competing consoles such as the Sega Genesis or Sony PlayStation. Most of the Nintendo platform-control measures were adopted by later console manufacturers such as Sega, Sony, Microsoft, and Intellivision Entertainment although not as stringently.

I’m less concerned than our friends at the Fed. Businesses are rebelling in mass against Trump’s punitive tariffs on steel, aluminum, and lumber. Trump is still blind to his own economic idiocy as I write. Given the torrent of negative press on tariffs in recent weeks, I suspect that a member or two of his retinue will force him to see the light. They’ll force him sooner than later.

Stock market downturn of 2002 9 Oct 2002 Downturn in stock prices during 2002 in stock exchanges across the United States, Canada, Asia, and Europe. After recovering from lows reached following the September 11 attacks, indices slid steadily starting in March 2002, with dramatic declines in July and September leading to lows last reached in 1997 and 1998. See stock market downturn of 2002.

Adjust accordingly. If you have to take some course of action, change the stocks you're buying. Historically, some stock sectors do better than others in declining markets. For example, high-dividend stocks tend to be less volatile than other stocks. They are usually insulated from big bear market drops due to the dividend alone. Sector-wise, utility stocks, consumer cyclicals, service-oriented companies, food and pharmaceutical stocks tend to do better during an economic downturn than other companies. Some stock sectors just tend to outperform others during a bear market. The bad news is that when the market does turn bearish again these stocks won't rise as fast and as high as, say, technology or emerging market stocks.
No expert prediction or technical indicator is necessary. The makings of the next crash are already clear. Whether it’s Janet Yellen or Jerome Powell who will head the Federal Reserve after February 2018, interest rates can only move higher. At the current rate of debt, even 100 basis points (one percent) higher interest will mean $200.0 billion in additional (not all, mind you, just the extra bit) in debt.
Now is the time to make sure you have a portfolio that you could live with through a crash. A typical crash will feel very different if you are 100% invested in stocks, than if you have some of your portfolio invested in bonds and other assets. The time to work out the right allocation for you is now, if you determine that you should not be completely in stocks but would rather have a 60%/40% stock/bond allocation, then it's critically important to determine that before a crash occurs. If you don't, you'll experience the worst of both worlds. You'll likely see the greatest losses during the crash, but also fail to benefit fully from any recovery. If you prepare ahead of time, you'll be better able to ride out any market events.