So you don’t believe in Warren Buffets adage of buying when others are fearful? Buy on the dips? Dollar cost averaging?
We are in a bear market (trending down) so buying on a dip really no longer applies. Worse yet, each dip could be the beginning of a crash. Timing the bottom of the crash is difficult, so you could buy when it dropped 1%, and was about to fall another 49%.
Buffet is more about holding onto your investments for the next couple of years hoping the market bounces back. This is why people generally recommend that you do not invest in the stock market if you need much of your money in the next five years. Teens will sometimes put their earnings in the stock market for a year or two before going to college, only to find their money halved by a crash right before they have to start college. They would have been better off buying a CD.
Dollar averaging makes a lot of sense right now, and in general makes sense. It evens things out, means you buy more in the bad times, then it the good times, so only costs you a little on average, but makes a huge difference in preventing huge losses. Usually they say, "it is not timing the market, it is time in the market" (meaning put the money in as early as possible, but dollar cost averaging is the exception.
If you get a large payment, an inheritance from Aunt Zelda, or whatever, put it in a money market account, or short term bond mutual fund. Then for the next year, every week, take one fifth of it and invest it in the stock market, preferably a passive, broad blend mutual fund. You probably also want to put 10% into a bond mutual fund. I go for Treasury Bond and equivalents, but even I am beginning to question whether the US Government is more stable than private bonds.