Based on my experience, I was able to get fair profit from joining bounty campaigns of a certain ICO before but the days of good campaigns are long gone and I know I can not rely on that anymore.
It's been long time forgotten though there are still project who delivered paying decently but more on the sides of scamming or
running away, or worthless token that you'll recieved.
Buying tokens can somehow be effective on making profits but not as much as it does before. There are a lot of cheap tokens way back that has a surprisingly high value right now and I think it could have been a good investment if only we believed on those tokens.
You have to move forward and not to dwell with this kind of attitude, there are still project just continue your chase who knows
you'll be able to catch it up and earned decently.
You can also make good profit from gambling but be aware of the risks before getting yourself involved. You can also invest on the top currencies like bitcoin and ethereum while it is currently experiencing a dump at the moment.
Gambling and investing got risk behind, know your limitations and understand everything behind this venues before taking your participation.