I think in this 2022 bounty hunting is best idea for earning money without investment. Because as we know that now almost IDO are being failed. And ICO, private sales are now very risky they also are being totally failed. You can go with staking, NFT or bounty.
I will prefer you bounty, you can check bounty page there are now a lot of great bounties these are of large pools and many of them are escrowed by bounty manger, so there is less risk of scam.
I went through a round and checked out the recent bounty projects, to be honest I would feel you wasted your time and effort joining the bounty campaign. Most of them are shitcoins and have almost no value on the exchange, some cannot be listed on the exchange and a lot of scam projects they don't distribute token to bounty hunters.
Bounty campaign is dead with ICO, now good project they will organize IDO, IEO events with very small amount of tokens and backed by venture capital funds. So the bounty campaign is now almost as unnecessary as the 2017 ICO.