Recently, I saw someone go all-in and then stay up late monitoring the market until their eyes hurt... To put it simply, grid trading/DCA is more like "buying a sleep insurance." You break down decisions into smaller parts to reduce emotional reactions; an all-in move is like pushing the pressure to the maximum all at once. If you shake your hand, you want to change the plan, and it ends up being a constant click on the confirm button.

When I was doing security work, I saw this a lot: the more anxious you are, the easier it is to sign or authorize things recklessly, especially with the recent complaints about miner/validator income, MEV front-running, and unfair transaction ordering on the chain. When the transaction sequence gets chaotic, the first to break their composure is often their emotional position.
Anyway, my current standard is very simple: if I can put down my phone and fall asleep, that’s the strategy that suits me; if I can’t sleep, no matter how "opportune" it seems, it’s probably just leveraging my mental health.