Good point, in the fast paced world of crypto it's easy to forget that 5% is a perfectly respectable return. Nothing wrong with aiming for singles instead of trying to hit a home run each time.
If you're sure that the long-term potential is high enough, sell at your targets, then buy on dips.
Trying to do this is what got me in trouble with ETH. I sold some of my stack on a price spike, intending to re-buy lower down. But the price kept rising and I panicked, bought back in higher with the net effect being I lost some of my ETH. And then it went down again... basically I'm terrible at timing the market. Much less stressful to just be a hodler and use a fairly mechanical cost averaging strategy to slowly accumulate.