I’ll just go ahead and state the obvious: BTC Cash may be the new BTC unless BTC core figures out a way to reduce mining fees and increase speed. If so, there is going to be a lot of desire to trade BTC cash on here. Perhaps, someday, BTC cash may even be the payment used for the security deposits if Bisq sets it up this way. For now, for all those not fortunate enough to have BTC at the time of the fork in August, it is tough getting a hold of this stuff. Does Bisq have any plans to offer a way to trade for it either with National currencies or at least with other cryptos?
BCH trading has been supported in Bisq since v0.6.1, released in November.
Coins supported are here: https://bisq.network/faq/#altcoins