In the past, whenever I mentioned cross-chain, I would only say "bridge," but now I increasingly realize that the essence of cross-chain is message passing: you send a message from chain A saying "I have locked/burned/authorized," and whether chain B believes it, how it believes it, is the core. The idea behind IBC is quite straightforward, but a single cross-chain transaction honestly involves quite a few trust assumptions: the security of both chains themselves, whether the light client/verification logic is written correctly, whether the relay team has gone offline or maliciously acted, plus a bunch of edge cases (upgrades, parameters, timeouts). Once any of these issues occur, they can freeze your funds.

I used to always look for the "cheapest and fastest" path, but now I care more about "what happens if it goes wrong": can it be refunded after a timeout, is failure predictable, who can fix it if something goes wrong. Recently, the heated debate over NFT royalties also seems to be about this—creators want stable income, traders want liquidity, and in the end, it all comes down to "how rules are implemented and who you trust to enforce them." The bear market is slowly taking note of these pitfalls... not learning about them makes you even more anxious.