You can always buy back when everything is back to normal or at least secure part of your investment and leave some FOMO holdings if you don’t want to missed out when this casino suddenly show some life on fixing their problems.
It’s not a wise a decision if you keep staking without getting the premium which your holdings main feature that makes you decide to invest on their token.
There’s a lot of investment opportunities out there that can give a decent APY even it’s not equal to the interest offer by this casino.
I think both options aren't worth accepting. First the options of selling fun tokens now and buy back later doesn't make sense because if the freebitco comes back to normal state the price of fun token will rise. So it is like selling at low price and buying at a higher price. Yes, you can sell, quit this project in a loss and look for other Oppurtunites.
Now, the 2nd option to continue staking may or may not be good. If the amount in question is very high and can be invested elsewhere, why not ? But then selling now means you are not willing to give it a try (hold) till the bull season which is so near now.