Lots of dump their tokens on the market as soon as theyre listed on an exchange. There are always a risk in holding, since you never know how the secondary market is going to treat a token. But equally, strong projects with good fundamentals have the potential to appreciate hugely in price.
How better do you think?
You can sell your tokens and see how they behave. If the tokens fall in price, you can buy them again and then sell them more. If they grow strongly, you too can buy them a little more expensive than you sold, but compensate for the difference with great growth.