This will probably be great for people who trade a lot of cryptocurrencies. In some countries crypto-crypto trading is free from taxation. When cyclic crypto bubble bursts and multi-year downtrend starts, you have to sell those cryptocurrencies for USD and pray exchange does not go bankrupt/hacked/exit scam or withdraw and pay taxes. Right now there are some forms of stable coins issued by private companies with no guarantee of buying back issued tokens. Very unstable market. FBCoin may change this. I believe first customers will be cryptcurrency exchanges.