I have participated in a bounty campaign as of now. I am curious that when every ICO bounty rewards I join when it hit on an exchange after a day, the price of the token goes way below its price. As for me a bounty hunter, what is the best decision if I received my bounty rewards, do I need to sell it immediately? or hold it for more 2-5 months.
It depends on how you are planning on treating your reward (as an investment, or as a source of income / payment for expenses).
I normally participate in bounty campaigns for projects I am planning on investing in or have already invested, so my plan is always to hodl for at least a year (the same way I would handle an investment, as long term savings). However, if you are planning on doing bounty campaigns as a source of income, then you might prefer to sell as soon as it hits an exchange if the price is right.