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 !

Yes of course. The ability to make money eventhough the market is in high value or low value is depends on the person or the trader on how he handle his money because the person is the one who thinks the strategy he will use in order to earn a good profit. Be mindful and strategic and it'll sure to give you a good profit even if the market drops..