During the G20 meeting, the nations said they will implement the standards of FATF as these standards also apply to cryptoassets.
Nations which are found to be uncooperative with FATF standards may face being blacklisted. It will also become harder for the citizens of that nation to open bank accounts in foreign countries and send money abroad, and they would be paying higher interests in finances.
I'm not 100% certain about the bolded part. It almost sounds like they are planning to impose economic sanctions against uncooperative countries which could be a somewhat drastic and severe measure.
Also if the G20 follows through with these measures it could drive people to embrace crypto currencies more as they seek ways to circumvent what could be considered overbearing and unfair regulatory practices on the part of collective states.
The G20 meeting concluded that cryptocurrencies needed to be examined. In a press conference by Federico Sturzenegger, Argentina’s central bank chief, he said that the member nations agreed that they still need more information about the industry before they can give their recommendations. The international forum set a deadline in July to decide on what data are needed.
Argentina is interesting in that I think the region identifies largely as being 80% roman catholic. Yet, Argentina was one of the first to pass gay marriage years ago. Argentina may be somewhat progressive and bold with the legislation it passes and so I'm not certain if this can apply to the rest of the G20.