I looked at the variety of choices in this article and some of the ones you can get in the Binance FIAT market.
USDT is easily king here. I also looked at the volumes of the FIAT currencies of Russia Ruble, Turkey Lira, and Nigerai Naira. Those volumes don’t even register but I do see how Binance may use these as a form of backup in largest stablecoin like USDT don’t work out. When I say don’t work out, I mean if there is some legal or registration problem. For example,NOTE I now post my TRADING ALERTS into my personal FACEBOOK ACCOUNT and TWITTER. Don't worry as I don't post stupid cat videos or what I eat!