Its hard to find good project and you can't predit what happen that project in future.
So, before you want to join Bounty, you must check it carefully and don't forget to always check it every time.
Because only check 1 time is not enough to trust that project.
Checking is not the matter, there are some projects that looks cool with strong team, but failed to deliver, nearly 80% of bounties are scam, they end up sending worthless tokens to participants, one of the best way is to join a campaign that is being handled by a reputable manager,