The best way to get good profit from bounties is to sell quickly once trading starts, this way you will get good reward and you can buy back when the price goes down
Sometimes dumps happen so fast that you won't be able to get a good price. When the floodgates open everyone will want to do the same thing.
If you miss that ppoint and see the coin is looking like it's oversold already it could be a good idea to wait and see if it recovers.
Not all coins are total shitcoins that keep dumping to 0 and if you happened to hold that worst shitcoin you've screwed up by joining the bounty, not by not being the first to sell.