Just now, my phone popped up a red dot indicating a successful cross-chain transfer, and I was stunned: what exactly am I trusting... To put it simply, a transfer from A to B is not just "sending a message." First, trust the source chain itself not to rollback or be reorganized into chaos; then trust that the proof / relay operators are seriously forwarding without carrying private goods; if using a bridge, also trust the bridge's validators / multi-signatures not to collectively fall asleep, and ensure the contract doesn't do anything weird, and the target chain's reception logic isn't replayed. The IBC approach at least clarifies "who is responsible for proof," but in the end, you're still trusting a series of component and human operation processes. Airdrop season makes everyone like clocking in at work, task platforms become more and more meticulous in anti-witchcraft measures, and now I first try small amounts for cross-chain transfers... Impulses are impulsive, just add a little to the position and then stop.