Scaling out of positions: is there a 'right' way?

Hey everyone, still relatively new to managing more than just small, single-entry trades in crypto. I've been experimenting with scaling out of positions as they hit profit targets, say, selling 25% at TP1, another 25% at TP2, etc. The idea is to lock in some profit while letting the rest run, but I often find myself wondering if I'm doing it optimally. Sometimes the price just keeps going after I've scaled out a chunk, and other times it reverses hard right after my first scale-out, making me wish I'd taken more off the table. It feels like there's a real art to it.

For those of you who have been doing this for a while, how do you approach scaling out of positions, especially in volatile assets like $ETH or $SOL? Do you use set percentages, or is it more discretionary based on price action at the target levels? Any insights on managing that balance between locking in gains and letting winners run would be massively appreciated.