What exactly do you want to bet on? I would advice you to go for something you're talented in and passionate about. Becareful not to be too attached to the monetary rewards. Do it for the passion and you will likely do well.

By the way, do you know how to bet? if no, then learn to bet first on any reputable/responsible betting site, probably for free, before committing any fund into betting. This should help you decide whether you are qualified and can succeed in betting. It's better to learn a business before committing significant funds into it, so you don't gamble and fail.

Beware of any betting site that promote gambling or encourage you to gamble. Use your precious Bitcoin/crypto for things you know how to do well. Gambling and taking big risk are basically thesame thing. Try as much as possible to minimize risk by learning how to bet.