I don't know for most of casinos, but casinos that I use support TON: BC.game, Rainbet (only deposits, but no withdrawals) and Whale.io. I prefer TON as I have some funds in TON and withdrawals are pretty cheap.
Casinos are calculative when adding coins they support. Since they are not like exchanges, do not expect them to add every other popular coin that comes out. I have learned to live with that. I do have some very old casinos that I use, but they do not have support for most of the popular (trending) coins right now.