Bitcoin is a big deal. It's almost impossible to turn on the TV without seeing the virtual currency discussed from yet another angle. Even noted economist Paul Krugman is talking about it, calling Bitcoin "evil" right in the headline.

Krugman's ethical discussion is interesting, but it doesn't cover what investors really want to know: Should you treat Bitcoin as a serious investment right now? Could Bitcoin be the "sin stock" of the decade?

In the video below, Fool analyst Anders Bylund explains why Bitcoin is more of a toy and a trend than a serious investing vehicle today. Spoiler alert: The most volatile stocks on the market look downright sleepy next to a one-year Bitcoin chart.

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.