Actually if you are a professional investor, you can earn money both in the bull market and down point. The most boring is a market siderway, not the market down.
In strong declines, there is always the opportunity to go a long way in the opposite direction, so anyone who knows how to play in a down market will be rich quick in a bull market.
The important thing in a bearish market is the trend reversal, so remember that in the bearish market and as close to the important support points you should put extremely short SL. For this reason, you can lose 8 out of 10 orders, but just succeed 2 orders, you will get back all, even profitable.
So for a professional investor, you can make money even in a strong down market.
Prepare yourself for a solid strategy and psychology. Good luck !

I often do that even now when the market conditions go down, in my opinion the current conditions make us more careful in sorting out coins and analyzing, markets up and down also have the same risk so we just act on our analysis, just an example when I know ethereum fell yesterday I tried to dare to buy considering the decline to -14% so I decided to buy ask and now I get a 6% profit from my initial funds.