The author uses the trust dilemma of "who gives first/who transfers first" in secondhand coffee shop transactions as an analogy for Web3 cross-chain technology: reliance on cross-chain bridges/guarantee platforms leads to intermediary commissions, information leaks, and bridges being easily hacked; traditional DEXs are transparent and easily overtaken by MEVs. The author is optimistic about Midnight's ZSwap: ZK+ atomic cross-chain swaps complete transactions simultaneously, otherwise they are rolled back; it hides transaction intent/amounts, reducing the risk of being trapped; the core shifts from "trusting people" to "trusting mathematics."