Re: When I received the token, should I sell it immediately, or what? How do I judge

it depends on the person if he want to sell it all after he/she get the bounty reward but some bounty hunters wait's the coin if it's rising or not.

Some bounty hunters can't wait for the rise of that token so as long as its already on the exchange, they are dumping it fast.

Those bounty hunters that are waiting for that coin's rise then they have knowledge on where that coin is going. They do believe that coin is going to be valuable in the future so that's why they are holding it. Verdict depends on the holder, sell if you want to or hold if you have to.

But lately, I have decided for myself to sell my coins right away and not have to wait long. I had a bitter experience and now I will act differently

That's not bitter and I guess you just learned from the past when you had some bad experience.

You have all the chance to do what you think will satisfy your own style of holding and trading with those tokens. I'm into bounty hunting but I have some altcoins to hold and that's not different of selling during the dip and buying at high prices. You only need to decide on what you think is better for you.