It *might* be worth investigating the "gamestop" style short-squeeze opportunities that currently exist in crypto?  Read up on how the r/wallstreetbets shafted hedge funds in Equities, then take a look at current over-shorted tokens? (there's at least one I've heard of - you can find these out by looking at how many tokens some exchanges have allowed their users to lend - one in particular has lent more than 100% I think)

Probably the old adage applies - the highest return opportunities will usually carry the highest risk though, so do a *lot* of research first - your £10K profit is always going to be someone else's £10K loss!!