[quickthrower2]

It is not necessarily "don't invest" but do it with eyes open.

The problem is stocks are valued based on macro factors (interest rates, money supply and demand, lack of anything else good to invest in) and sentiment as much as the intrinsic value of the company itself. So a great company could drop in value if money stops being cheap. Let alone will corona virus cause a depression? People say stock market is not the economy, but who will be spending money on Google Ads in a depression, and if they are, what are they selling and who is buying it?

OTOH this could be a cheap time to buys stocks looking back from 2030.

I think if you can hold for a long time and ride it out it's a good time to buy (is that always the case though?). But a better time than January!