This is a sunk cost fallacy. If you keep buying FUN you might just end up more rekt. This token is down more than 90% in the long run so I am not sure what good results you are expecting.
The tokens that do well ...are the tokens with utility ..and having only 2 or 3 casinos accepting FUN as a deposit option ..does not really help it's cause. It is a bonus that it is still listed, but it needs a lot of trading volume to stay on there.

Also, we know all Alt coins take a knock when the Bitcoin price goes down... so it does not come as a huge surprise that the FUN token will also take a knock ...seeing that the Bitcoin price has dropped this much.

Yes but don't forget there is a burning program, and the 2nd token burn event should happen very soon, in the coming weeks if I'm not mistaken. Moreover a new casino, "xFUN casino" will also open soon with the launch of the new version of the FUN token on Polygon(2nd layer ethereum network