I believe that Bitcoin's main advantage is decentralization and what it gives us - full control over our money, no restrictions on the number and size of transactions. As for the economies of countries and banks, they can lose part of the profits, as now banks earn with every transaction we have made, a loan issued, and so on, and the state receives a tax on the profits of banks. Therefore, I think that the country's economy may be slightly damaged, but the living standards of people who use Bitcoin will become a little higher due to the lack of spending on taxes and commissions.