The US DoJ has indicted several people over cloning SIM cards. These were used to defraud persons by circumventing 2 factor security.
It is alleged in the indictment that the defendants executed seven attacks that resulted in the theft of cryptocurrency valued at approximately $2,416,352.
Steer clear of digital coins, the number of thefts has not decreased. China has experienced a growing amount of criminal activity which has forced them to expand the law enforcement system and build more prisons for criminals. Chinese prisons are well known for being very disciplined to a military standard.