Bitcoin exchange Bitstamp suspended operations on Monday after hackers swiped up to 19,000 bitcoins (worth approximately $5.2m) The attack targeted the UK-based exchanges operational wallets (also known as hot wallets) which are connected to the internet. The bulk of the exchange’s bitcoin reserves are kept offline and were untouched. The exchange has called in law enforcement with whom it continues to work closely as it attempts to bring the service back online. Other bitcoin exchanges that have been targeted in the past have fared poorly afterwards.”]