Bitcoin has climbed from below $1,000 this year to a record above $9850 , showing how quickly investor interest in the digital currency has increased. The number of digital currency storage "wallets" from Blockchain.info has nearly doubled from last year, while the lack of a selloff in other digital currencies indicates that new money is flowing into bitcoin. Many analysts attribute bitcoin's gains this year to a surge of interest from institutional investors, who are betting on the digital currency's future as a store of value or means of payment.