The concept of being a B2B marketplace is very interesting.
Will customers be able to do trading with fiat only and no crypto ?
Yes, customers can trade in fiat (this one of the first features we implement) while always pay the fee and in MTRc.
They also can trade in cryptocurrencies including MTRc.
MTRc will be trade on exchanges and also ModulTrade will buy MTRc back from Merchants.
How many cryptocurrencies are you going to implement? Anon coins like zec (and forks), xvg, nav, xmr? For sure btc, bch and ltc I guess
Probably just the big ones at first and expand as needed.