Hi Dr A Koin

If your coins are left on Bittrex, cryptopia, Bleutrade or Altex they will autochange them for you, as we will provide the X11 MUE to those exchanges (AVOID YOBIT AT ALL COSTS)

If you don't want to do that, we already have a coin swap system in place for when we migrate, where you register, send you Quark MUE, provide your X11 MUE address, and the system sends the X11 MUE back to you.

It's really easy basically.