I totally agree with your comments. Cryptocurrencies will be applied in the payment of non-cash goods. This will help reduce government printing costs. But these are cryptocurrencies that are fixed by governments such as USDT. Cryptocurrencies of high volatility, such as BTC or ETH, are difficult to include in actual payments. This will make it difficult for the government to control prices. And consumers are also difficult to use. And cash is still the perfect solution for trade exchanges in the coming years.