This is where purchasing management is needed. If you come to the market, when you see the price has risen slightly, immediately buy it without waiting any longer. That's usually how it is.
However, we can change this condition of course. I think this also needs to be paid attention to. For example, if you have fresh funds in your wallet, make it a habit to let it sit for five minutes, while doing a price survey. If you have found a suitable one, it has potential and it hasn't gone up for a long time, at least it's been a month before you buy it and try to buy it in stages because there is a possibility that the price will be corrected again downwards.
Don't buy when the price goes up, that's the wrong strategy, instead buy when the price goes down, then sell when the price goes up, even if you only get a small profit, but at least if the strategy can always be implemented correctly, you can collect big profits from the profits you collect.
To be fair, that sort of depends on the project you are talking about. When we are talking about something that depends on hype alone, like for example a meme project then there is no need to buy it when it's idle, only buy when it is going up, because it will continue to go up, they just skyrocket when they go up, but you need to be early anyway, just like buy when it's 10% or less that day, if it went up 50% that week then yeah don't buy it when it's at peak.
But, when we are talking about something as strong as bitcoin or ethereum, I agree that you should not buy that when you see it going up, you should buy it when it is going down, so that you buy it when it is cheap and could sell it when it's higher eventually in the future when it recovers.