What is the most expensive currency? Swiss frank?! No it is Bitcoin and it costs $ 670 .Nikto can not uncontrollably print Bitcoins. This crypto-currency is not controlled by any government or bank. They can print everything, but it requires enormous computing power and energy consumption, and with each new Bitcoins they need to be more and more. Bitcoin is an internet gold. Hacking the system is only possible if the prevailing computing power than all the miners (the creators of new Bitcoins) combined. No one can be arrested Bitcoin account nor the CIA nor the FBI nor the FSB or Mossad or any mi7 aymbi because the currency is decentralized, there is one organization that is able to block this bill))) While the anonymity that loved all criminal organizations. No one will ask the passport data in order to create a bit of a purse. Just one set of numbers to send money to another set of numbers))))