Who makes money in crypto now? Bounty / airdrops are no longer relevant, trading is not for everyone, ICO is no longer profitable, mining is also not profitable enough
I myself receive income from the nodes, feels good, and I recommend you to explore this niche. Good luck to all!
Buying masternode is not a bad option, if the coin project keep developing and going smoothly, you can earn many income from it.
Investing in ICO still can be profiting only if you participating in a worth project.
The problem is, there are no many worth ICOs to invest, only few are running nowadays.