Which is more advisable.
1. Keep bounty tokens until they become valuable or
2. Sell bounty tokens at its worse peak to obtain Bitcoin or Ethereum

?
You can still divide it into half. The first half can be hodl until they will have a greater value in the market. And the second half, you can sell it and exchange it into another coins or even into btc or ethereum. It also depends on the potential of the bounty token you have earned of course.
which one is this bounty?
Oh I think you are lost. Please do read about bounties or go the beginners help section to expand your knowledge.