The cryptocurrency relief rally over Investing.com - the G20's hands-off approach to regulation may be a triumph of hope over reality.Just because the G20 declared that cryptos are not a threat to the global financial system does not mean they are not a threat to investors. Nor does it mean that digital currencies are not a problem when its comes to money laundering and terror financing.They are all major concerns of some powerful G20 members and the International Monetary Fund.The U.S. for one has made it very clear that existing securities laws apply to digital coin offerings and cryptocurrency trading exchanges and is cracking down on apparent violations.The U.K. and European Union are equally concerned about protecting investors.Japan is not going to stop inspecting exchanges or suspending their operations when irregularities are discovered. And the U.S., Japan, E.U. and the IMF all want to crack down on the use of cryptocurrencies in money laundering and terror financing.Regulation -- whether it's the creation of new rules or the application of existing ones -- is a matter or more not less.