In terms of multiplier gains I think some altcoins can beat that overtime. But bitcoin is one of the trusted crypto in the industry and you might not be bothered of potential scam like altcoins.

Just like littlemouse said, you could use Binance if cex isnt a thing or issue with you, and he did suggest a dex for bitcoin trading. Might as well, focus on doing decentralized first, by incorporating yourself with how to handle btc in wallets. Then proceed only on cex, if you are comfortable already.