I have a strategy for this which worked. If the bear session has just started, do not buy bitcoin. If the bear market worsen, you can start accumulating bitcoin. If bitcoin fall far more than expected, that is indicating that you should buy huge. The money I suppose to use to accumulate is divided into 2 each time which I will later use to buy bitcoin at once later if the price fall more than expected.
If you are just hoping for Bitcoin to fall further and that is your goal to buy more Bitcoin, I think you will waste more time waiting because Bitcoin price gaps do not always happen, especially in the current market conditions. But if you feel good about that strategy, I think you should wait for a bigger bearish session or after the bullrun is over. Because Bitcoin tends to increase in price after a price crash and you can see that based on the four year cycle of Bitcoin.
So you should be able to appreciate your time more to buy Bitcoin at any time if you like the profession of investor, but if your goal is only to trade with Bitcoin, of course the profit you can get will not be enough, especially if the strategy you use is more directed at waiting than buying.