$BTC One of my biggest trading mistakes was rushing in without a plan. I once bought a token solely because it was trending on social media, without taking the time to do research. Result: a 30% drop in a few days. I also underestimated the impact of fees on my small trades, especially during a swap on a DEX where the gas fee was very high. Finally, I sometimes used a market order on illiquid assets, causing significant slippage. Since then, I've learned to be more methodical, to always set a stop-loss, and to prioritize thoughtful trades over impulsive ones.