You can still gamble with bitcoin and other altcoins. I will not be surprised if bitcoin is still massively used by gamblers today. But if there is something you enjoy about unstable coins in gambling, you can still use them.
In this context op is not saying it not longer useable, you just need to understand the op better!
In the concept of stablecoins now being used more often than bitcoin and other major altcoins, it now feels like it's almost same thing with gambling using fiat not cryptocurrency, it felt like it was crypto gambling in the days where USDT and other stablecoins where not much in use but today, it seems like the so desired crypto world of freedom or unregulated world is not slightly going back to the hands of those they wanted freedom for, I guess I speak ops mind here.