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.
for non capital needed, bounty campaign was best choice. maybe some of them give us penny reward but atleast we got some money that could used to trade and earning more profits. alot good campaign actually but unfortunately most of us give up and prefer to stop.