One of the biggest crypto exchanges goes dark and users are getting nervous

One of the biggest cryptocurrency exchanges has been down for hours and its clients are starting to freak out.

Kraken went offline at 9 p.m. Pacific Time on Wednesday for maintenance that was initially scheduled to last two hours, plus an additional two to three hours for withdrawals, according to an announcement on the San Francisco-based company’s website.

"We are still working to resolve the issues that we have identified and our team is working around the clock to ensure a smooth upgrade," according to a status update on Kraken’s website posted seven hours ago. "This means it may still