Hello Maceraci.... How are you?

You can make a deposit using Dogecoins and then you can change these to Bitcoins to buy virtual mining machines, the new Rollercoin Token or withdraw your Bitcoins from 0.00010000SAT each time.

In general, Rollercoin is an online Bitcoin mining simulator game. Not an exchange, not a trading plattaform. Thanks for ask.

Kind regards.