A bitcoin automated teller machine (ATM) stands at the Coin Trader bitcoin retail store in Tokyo, Japan, on Wednesday, Aug. 30, 2017. Stock of Bitcoin, the best-known digital currency, has surged 358 percent this year. While staggering, lesser-known competitors have seen even bigger gains, such as the more than 4,000 percent increase for ethereum. Photographer: Tomohiro Ohsumi/Bloomberg via Getty Images
Two high-profile security breaches this week – including the biggest cryptocurrency theft in history – are raising questions on the safety of storing funds in a wallet on a crypto exchange.
