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It's true that the gambling based tokens usually didn't give high pump . Because those tokens are only used by gamblers and So they try to keep them in a stable flow . Even then some tokens are seen to pump when they are listed on good exchanges. And if you see currently most of gambling website make their own token for giving gamblers extra facilities. And as your state it's one more cause those token is not pumping because of the bearish market .
Many gamblers use platform token for gamble but also many people trade gambling platform token on exchanger as another cryptocurrency trading . but in my own experience i know Gambling platform tokens are not listed on good exchanges like Binance, FTX, Coinbase. So the tokens are not likely to be traded by potential big traders. So gambling tokens are not seen to be more pumped.
It's true that not being listed on huge CEX is big factor for the price of the gambling tokens and the only gambling that I know that listed on Binance was FUN token which experienced mega pump the rime it was listed on Binance few years ago. Most of the new casino tokens still doesn't experienced this kind of pump since big CEX has a strict requirements on losting tokens that related on gambling which FUN token dodge since ot was listed on Binance before they updatethere requirements.