Well, like you said, let's assume a magic happens today and I became a developer which is going to last only for a few hours or minutes, then I would first of, create a decentralization blockchain platform that can allow every Bitcoiner from every part of the world to freely and easily buy and sell Bitcoin without going through KYC procedures. Secondly, I will remove Bitcoin from every centralized exchange if that's possible to do, then allow btc to be traded only on the DEX or other DEX.