It depends on how the project is moving forward along with meeting the community's expectations and trust. In my case, let's say that the bounty tokens are distributed without vesting. When the token is on exchanges, it depends on the price movement and trading volume of that specific token. If I see the price is peaking, I would not hesitate to sell immediately. However, if the token is vested for a certain period of time, well I have no choice but to just sell it even if it's just 5%, 10%, etc. But again, it depends on our instincts of that certain project.