Investing.com - Worries about a regulatory crackdown have weighed on cryptocurrency prices for most of this year, so be prepared for a new wave of anxiety when G20 members meet next week. Cryptocurrencies will most certainly be on the agenda at the March 19-20 meeting of finance ministers and central bank governors in Argentina.U.S Treasury Secretary Steve Mnuchin has said he wants a discussion on the currencies because he is worried about their use in money laundering and terror financing. The finance ministers of German and France have also pushed for a discussion, saying the digital currencies represent substantial risks to investors.The two E.U. countries are reportedly preparing a joint proposal on the regulation of cryptocurrencies, which could be the first step in an E.U.-wide initiative.Two other key G20 members -- China and South Korea -- have also been exploring measures to reign in cryptocurrencies.There's speculation that the meeting could even lead to a global regulatory framework.