the best strategy is DCAing, 17500$ per BTC weeks ago was a good opportunity honestly, for the short time some said but might be the last for the long term too, instead of guessing and making predictions avoid sitting on your hands and do nothing.
I guess some would be wanting on another wave of the pandemic or of a different kind, lol... But the truth is, even if the world experiences a little short down, it won't be like we had it in 2020. Nope, not at all because, the world has grown more aware of what has been online around them and the pandemic brought that to there door steps, there rooms and most persons now seek even more opportunities online.
When we talk about best opportunities, I think even now is a right opportunity. Yes, right this moment is one of the best opportunities there is only if you could have a visionary eye to look into 5years from now. Just invest and be ready to hold.