Millennials, as might be expected, are pretty much on top of the digital universe—so maybe it shouldn't come as any surprise that some are actually saving for their retirement that way: with digital currency.

Forbes reports on some millennials who are investing in bitcoin and other cryptocurrencies as the medium in which to stash their retirement savings. And, according to the report, "experts say that could shake the foundation that this country's financial institutions have built their empires on."

The article quotes Roshaan Khan, a 20-year-old senior at Virginia Commonwealth University who recently invested in both bitcoin and ethereum (another form of cryptocurrency), saying, "All of my net worth is in cryptocurrencies, because I see them as the best way to escalate my ability to be financially secure and pay off my student loans. I like the idea of decentralization, the fact that there's a lot less corruption and political ties. That idea appeals to me … Not having to go through banks. Having financial control over our lives again."