It may take many more time  to take listed on those websites because the tokens of these gambling websites do not even come close to the requirements to be listed on Binance. The trade volume wasn't enough for that and with so many gambling websites, they are not able to achieve that amount of trade volume, and now most of the new gambling websites are coming out with their own tokens, so I think that Bitcoin, BNB, Ethereum are the top level coins from holding these coins.  Better to hold.