The market will stop dropping when:
1) We get a vaccine for Covid-19
OR
2) It's run it's course in the USA or perceived to be over, 'peaked', whatever.
As long as Covid-19 is still rising in the USA, then this means that there is bad news yet to come. For those who (erroneously) subscribe to the efficient market hypothesis, there is lots of bad news yet to be baked into the market price of stocks. There is lots more hand-wringing, finger pointing and blaming to go around. Perhaps even a few high profile bankruptcies. But, there will also be low profile fortunes made (who's gonna come out and say that they got rich off this illness?), so indexers will be on balance, well, even.
As I write this, the DOW is at 22,104 (up 904 points) on the day. For traders, this is a good opportunity to get out because you will have lots of opportunity to get back in at lower prices.
For long term investors, there's no wrong answer, as 'this too shall pass'. Prepare to empty the piggy bank as soon it will be a great time to load up on stocks, once the smoke has cleared.