Trading in a bearish market is like disarming a bomb; you don't do it unless you're an expert, and in that case, the expert should be non-greedy.
The best trading advice in a bearish market is to buy the dip, and that's it. Judging by Bitcoin, I'll say the dip will be at 45 tomorrow.
You are right. It is better right now to buy the dip. DCA is the best strategy that can be used. You may not buy at once with all your money. You an start buying the dip with small amount of money every week. Some people would have started it when bitcoin fall below $60000, they can buy more now which is another advantage.