a experience crypto investor will never buy when price is going up, capitulation is very important, that is the best time to buy and relax peacefully.
Yes you are right if you are gonna trade for long-term then it is obvious that you should find a good dip for trade. On the others hand when you came for short-term trader .But on the other hand, in the case of short-term trading, I think professional traders do not care whether the market is high or low, they analyze the candles of the chart well and then trade.