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You seem to forget about China, last year President Xi Jinping announced he would issue their cryptocurrency this year, but don't know yet what month it will be realized. and one more country that is rumored to be starting to use digital money that is Malaysia, cmiiw
Just giving issues only without have implementation about when bitcoin become legal currency payment transaction, I have bad opinion with Chinese president when said will make bitcoin as legal currency payment only for running their chance to sell bitcoin with higher price, maybe make the same statement when finished buy bitcoin with lower price and announce to public for accepting bitcoin in China.