Many bounty campaign give token..often token bounty has not been paid .. you already exist in the market .. after the price paid it down drastically ... if we hold the token .. later will be able to rise or even added down the price of token bounty
Real life application and usability of the said token will greatly affect the price, just because it is traded in few exchanges does not mean people need it. Many of the trades are done by bots so they just randomly chose tokens/coins that reach a certain price according to the bot configuration.
If you expect to see a rise in price, consider checking out the real world applications of the token and see if it has potential that when it is marketed properly - people will see the benefits and buy them.
I suggest guvnor's mentioned. Considering it as an advice if the token is need by most people then you should hold. If i we're you i would trade my bounty tokens to other crypto that is more successf than the bounty token you received like ethereum for example. By doing so the risk you are facing will be lessen and made you comfortable. Trading your bounty coins to popular coins is a great move you would made. Good luck.