I think that with digitalization, paper money will soon be out of circulation. The development of digital payment methods, the development of the banking system and the emergence of cryptocurrencies prove this. In this period we are living in, digital fiat money is already widely used, but even though it is used digitally, it has inflation due to its fiat feature and is used physically. Cryptocurrencies have become inevitable for payment systems at this point.
Even the high commission fees charged by the banking system for international money transfers are an important reason to use cryptocurrencies. We can include bitcoin in payment systems, but for me, bitcoin is digital gold. Because btc is much closer to gold in terms of value retention and inflation protection. To realize a payment system that will be very common in the market, we will need usdt style coins. With the regulations that will take place in the crypto markets, crypto will be permanent for the payment system.
Your analysis of the current shift from paper to digital is very sharp. People are rightly looking closely at the standard banking system, which has a lot of obvious problems, like the high fees for sending money between countries. Then came cryptocurrencies, which are supposed to save us. But lets take a moment to think about this critically.
As you correctly pointed out, Bitcoin isnt always our first choice for popular payments. Its main purpose is to protect value, similar to gold. Because it changes quickly, it cant be our daily business savior. This is why steady coins like the USDT are important. But the change to an economy based on crypto isnt going smoothly. Its full of risks and unknowns, mostly because there arent enough strong rules. Cryptos wont really be able to take off until there is a complete system in place for regulating them.