Bitcoin will not be issues over the maximum supply ,and nobody can make a 'fake bitcoin'. These country need to save x bitcoin to issue their monet, they will have a healty economics system, the other countries will happy to keep their money and want to trade will them.
People won't be afraid of inflation , and the prices will not going high in a long cycle times.
If its only advantage over the gold standard is greater transparency and resistance to counterfeiting, I don't see how it could work; the reasons why gold standard was abolished had
nothing to do with these factors after all.
I know deflation sounds good on paper, but the reality is that it discourages spending, which drives prices down, which drives businesses out of business, which causes economic collapse. It's not something you would want out of your national currency, or at least not in this modern economy. If you want to escape inflation, you can easily diversify with assets like Bitcoin; there's no need to base your national currency around them.
Today some countries accept the use of bitcoin because they think it helps a lot to improve the transaction and lessen the paper money or the real money. Those are the reasons why people commit crimes because of the greed of too much wealth commonly for cash. Even you have online money. Still, some people are knowledgable in hacking that may steal your data.
Accepting bitcoin and another cryptocurrency may help a lot to have a faster process. It also affects the market price on the crypto because if the coins are demand in different countries. The price may grow up and avoid deflation in the market.