Actually, everyone understands that losing money is often not due to the wrong direction, but because the techniques are too rough.

Yesterday, I did a small test order on an L2, thinking to take advantage of the hype (testnet incentives, points system) and make a quick trade,
but I impulsively used market price, set slippage casually... and got filled at a very bad price.
Looking back, the depth was only that much, the order book was as thin as paper, I even chased the price in two attempts,
which basically pushed the price up myself.

The summary comes down to three things:
Don’t just look at the quote screenshot, check how much the pool/order book can actually handle at that moment;
Don’t settle for “close enough” on slippage, it’s better to trade less than to get a worse fill;
Take it slow, split orders, set limit prices, waiting a few seconds is not shameful.
As for the speculation about whether the mainnet will issue tokens... Anyway, I’m now more concerned about not becoming a liquidity withdrawal machine,
that’s all for now.