You just have to do one thing. When it bearish and the price dips, invest more. Keep investing what you can afford to lose. In the long run, you will be making massive profits. If you are looking for making profit in short run during bear market, then you can try trading. Take advantage of the volatility and earn some quick profit. But the risk is high. Avoid looking for "new" altcoins that will give you some quick profit. Most of those coins are just pump and dump scam coins. And you should be careful when trying to earn interest with bitcoin. To earn interest you will have to store your coins to wallets that you don't own. Not your keys, not your coins. If the key owners get hacked or disappear, you lose everything.
I could not agree more with you. When it comes to the strategy to carry on earning in the crypto market despite of Bitcoin turning bearish, investing more and taking advantage of the price dips is the wise thing to do. This is of course after a thorough analysis of the market and the potential of the coin as well. Although this is indeed risky, it can also bring more profit if done right as aforementioned.