Last night, while watching on the chain and drinking at the same time, I found out about the "Sandwich + Arbitrage" thing. You think you've scored a deal, but actually many times you're just helping others collect fees and tips... To put it simply, the moment you place an order, someone is watching your pocket nearby. Recently, a bunch of new L1/L2s are offering incentives to attract TVL, and old users complain about "mining, selling," but I think that's normal. Human nature is like that: when there's an incentive, people come to exploit it; when there's liquidity, people come to squeeze it.

What I don't regret is: every time I get itchy to jump in, I first lower the slippage, avoid using too aggressive market orders, and prefer to eat less rather than get educated on the spot. Anyway, opportunities are everywhere every day, but the experience of paying tolls... once is enough.