You should restrict the
"pretty much all altcoins" claim to a limited number of coins, something like the 30 TOP listed in Coinmarketcap.com, the most reliable coins... It will be more safe to users and for you, since there are a lot of useless crappy coins just to be used in pump and dump schemes.
I understand the concept and the idea of accepting a large variety of altcoins, unfortunatly this is not possible, it would be nice if most of them weren´t so crappy.
EDIT:
Hello LuanX3.Thanks for your interest.That statment was pretty much a generalisation.As far as I'm informed,at the moment we're accepting Bitcoin,Ether,Ripple,Litecoin,Dash,NEM,Monero and a Romanian-based cryptocurrency whos name I cannot remember at the moment(sorry!).
Just didn´t saw this info before, so you have restricted to a certain number of coins, that´s better.