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The incident has been reported to the relevant authorities and law enforcement and we are co-operating with them as a matter of urgency,” it said. The statement urged users to change their online passwords. 3,000 in less than 24 hours, according to coindesk, a website that monitors the price. 1,000 at the beginning of the year. Prices for bitcoin fluctuate from one exchange to another. That’s more than Canada’s two largest banks, Royal Bank and Toronto-Dominion Bank, are worth — combined. I’m kind of taken aback by what’s happened in the last three months,” said Richard Johnson, an analyst at Greenwich Associates who owns digital currencies and considers himself a bitcoin bull.

I’m concerned things are moving a bit too quickly. Bitcoin is the world’s most popular digital currency. Such currencies are not tied to a bank or government and allow users to spend money anonymously. They are basically lines of computer code that are digitally signed each time they are traded.

Miners of bitcoins and other virtual currencies help keep the systems honest by putting computer power into a blockchain, a global running tally of every transaction that prevents cheaters from spending the same digital coin twice. Online security is a vital concern for such dealings. In Japan, following the failure of a bitcoin exchange called Mt. Gox, new laws were enacted to regulate bitcoins and other cryptocurrencies. Gox shut down in February 2014, saying it lost about 850,000 bitcoins, possibly to hackers. Closed Captioning and Described Video is available for many CBC-TV shows offered on CBC Watch. One of the core challenges of designing a digital currency involves something called the double-spending problem.