Curtis “Cocky” Warren, who is being released from a 14-year stint in prison, has been banned from holding Bitcoin. If he breaks the rule he could face another five years in prison. Warren was once worth $227 million and was likened to Pablo Escobar. Warren will also be forbidden from using social media, will need to give a day's notice if he wants to get into a friend's car, and is only allowed to have one mobile phone.