I invested via InertialFinace to bitcoin trading. Finally I applied for withdraw in amount of 5400EUR. The company had accepted it and made transfer to my coinbase account. In my coinbase account was never before made transfers more than 100EUR in value. Therefore, as the company says, I have to send bitcoins in a value of 5400EUR to so called liquidation wallet. And only then if the liquidation process is validated, I will be automatically returned my own deposit and amount of withdrawal. My question is, is that liquidation process a common procedure and is it thrustworthy?