The biggest money making slot in crypto space is to be
1. a developer
2. build crypto wallets for new projects
3. find bugs in the system of many new projects
yes some paid for security breaching and all that stuff, rendering professional services is the best way to make money in crypto space now
I think what you said is true, of the three things you mentioned, we can indeed make a lot of money from there, but these three things require ability, capital, and experience in their fields, then what if we don't have that? therefore people will prefer to do bounties and airdrops, while increasing knowledge about the world of crypto