Getting your head around cryptocurrencies was hard enough before governments got involved. But now that policymakers around the world are drawing up fresh regulations on everything from exchanges to initial coin offerings, keeping track of what's legal has become just as daunting as figuring out which newfangled token might turn into the next bitcoin.
The rules can vary wildly by country, given a lack of global coordination among authorities. And while that may change after finance chiefs discuss digital assets at the Group of 20 meeting in Buenos Aires this week, for the time being there's a wide range of opinions on how best to regulate the space. Below is a rundown of what major countries are doing now.