No, it is not. Please just make it sideline and you must have a regular source of income because there are a lot of bounty hunters that are going through so much stress and sometimes depression including me whenever a bounty is just a fraud. They probably pay you but the months you render to it is not even close to what they paid you.
Many bounty hunters dont getting paid because many reason. Sometimes the project can not reach the target or the developers team are scam. Doing bounty is good as long the project are legit and can reach at least soft cap target