Bitcoin has been on a tear this year.

The virtual currency, which is exchanged anonymously via an online peer-to-peer network, might be starting to go mainstream, as the recent announcement that Silicon Valley Bank will hold Bitcoin deposits suggests.

And while there has been a lot of increased interest in Bitcoin as of late, given its meteoric rise, there's still one big problem, as this week illustrates.

On Monday, a technical glitch caused a "flash crash," causing Bitcoin to tumble 23 percent.