What cryptocurrency exchanges are you planning to launch?
TMV is a stablecoin and on the platform they have their internal exchanger.
Internal exchange is not enough if coin wants to have a develop ecosystem and to be actively used. I think that listing on others exchangers is obligatory.
Most projects strive to get on the exchange because otherwise they cannot sell their tokens, then everything is the other way around, an internal exchange solves this issue. Plus, on the exchange, traders can lower the price of a coin, which will cause investors a negative.