I later realized that I can't hold onto spot positions, and I always want to turn things around with contracts. To be honest, there's only one problem: betting too heavily, and your mindset can't be stable. As for position sizing, a simple rule: first, think clearly about whether you can sleep peacefully through the worst-case scenario. If you can, keep it; if not, reduce it. Don't take "I think it will go up/will go down" as a reason, because that can change every day. Recently, cross-chain bridges have had issues again, and oracles still occasionally glitch. Everyone is "waiting for confirmation," but it's actually the same logic: if you don't prioritize certainty, don't open too large a risk exposure. Anyway, I now prefer to earn a little less rather than relying on luck to patch holes.