There's practically one that intrigues me - "stick to what works for you".
Market can change anytime and in different market phases, your strategy can work well for you or can fail for you in another phase. So don't strongly believe that one trading strategy can work well for you forever, in any market phase. If you have such belief, you will pay expensive cost in trading.
But that's not all. We'll still need to:
1. Choose an exchange with high liquidity.
2. Choose an exchange that is cost-effective in terms of trading fee.
Right now, we've got the likes of Binance, Bitget and Bybit flexing top muscles with competitive fees.
Which do you prefer?
If you focus on centralized exchanges, tier 1, you can have high trading volume, but please do your research about what happened with FTX exchange. It collapsed and eventually bankrupted within a week.
Risk of storing your money on centralized exchanges, no matter how big they are, is very high.
Reminder: do not keep your money in online accounts