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https://www.ft.com/content/78bf5612-0b1a-11e8-839d-41ca06376bf2

Central banks must clamp down on bitcoin and other cryptocurrencies to stop them "piggybacking" on mainstream institutions and becoming a "threat to financial stability", the head of the Bank for International Settlements has warned.

Agustín Carstens, general manager of the BIS – known as the bank for central banks because it is where they hold accounts – condemned bitcoin as "a combination of a bubble, a Ponzi scheme and an environmental disaster".