Bitcoin is not having new all time high prices every year, it follows the cycle of Bull then bear so if we are having 65K at the end of this year then 2022 maybe the price will go back to 30K or even lower.
I agree that we are not going to have all time highs every year, we may have some increases few years maybe but eventually we will have a crash here and there as well, that is why I write like 2-3 years high and one year low, two three years of high and then low, that is how I do consider it. In the end it shouldn't really matter though, we are in a situation where we do end up profiting from this situation, after all we end up with a profit in the long run so why care about the drop?
If you do not need this money and the money you invest is "spare" money that could go down, just buy it and let it be, because you will eventually profit from it one way or another. That doesn't mean that we should be considering this as a useless deal, it is still a great deal that we could drop and that is why we should be careful, especially after such a huge increase, but that should scare us too much to run away from bitcoin.