Previously, there were quite a few projects where all the payments for participants of bounty campaigns were paid in Ethereum or Bitcoin. These coins are very popular and you can say that this is almost a fiat money.
Personally, I believe in crypt. There are a lot of projects that are now at the stage of formation and implementation. Crypt actually help to monetize many processes and you can get money now even for viewing ads or playing your favourite video games.
In the crypt, the safest way to make money without investing is to participate in bounty campaigns. Last year I managed to earn good money, but in 2018 bounty rewards have decreased. Nevertheless, there are still perspective campaigns