Japanese representatives will push for the adoption of global rules on cryptocurrencies at the upcoming G20 meeting in Argentina. Next week, the summit will gather finance ministers and central bankers in Buenos Aires. Other countries also want to put crypto matters on the table, with signals coming from key members of the European Union.
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https://news.bitcoin.com/japan-to-call-for-crypto-rules-at-the-g20-summit/It is very interesting what legal regulations they want to propose. I do not think that they want to ban crypto-currencies or to establish strict limits to their use, since Japan has a positive impact on their development.