That's a bold thing to say. The cryptocurrency market is unpredictable, so objectively, anything can happen, even in the current state of the market there can be a sudden upward movements that will make investors regret selling their coins for a measly 20% ROI when they could've seen bigger profits should they have waited a bit longer.

In such unpredictable market, best thing to do during a bear season is to either hold your coins or buy some more while prices are low, if you're patient enough, those 20% would look like a joke in the long run.