bounty is just like other kind of investing, you have to accept the risk and do the work
it's not asking any money, but the time it takes, if it's not your free time, consider it as a time invest, cause in that time, you might make more money than doing some that stuff
There are actually lots of ways for you to earn cryptocurrency. Just like in investing, you are buying some tokens that the project is proposing and wait for the right time that they will be successful and they will be listed in exchange so that you can sell the token you bought. You can also mine crypto, in order to do that you should have a high specification of video cards and any other rigs and you need the power supply which is the most important. I can also say that you can earn with your own knowledge by joining bounty campaign and promote particular signature campaign and they will pay you back because of the tasks you have done.