You have to get the bounty tokens first. Than you can sell or hold.
Currently more and more doesn't pay the promised Rewards.
In addition, the high transaction costs for tokens are currently very inconvenient.
Some projects does not pay at the moment.
can not be denied if there are so many bounty projects that do not pay after the project is completed and there are many that have been distributed but left by the development team, so that tokens that have entered our wallet will only become spam.
the possibility of a market experiencing a very long slump has made it happen and many people are not responsible for using it all to be able to make a profit for themselves.