At the present time, with the current capacity of the Bitcoin market, it is difficult for Bitcoin to have a positive impact on the economies of countries. Doubling profits every 4 years will not help countries achieve economic growth that requires billions of dollars, and countries cannot use Bitcoin as a guarantee to obtain development projects.
In short, Bitcoin is still in the early stages of achieving a positive impact on the lives of societies and countries.
Bitcoin will be very useful in the case of individuals and improving the level of income in the long term for individuals, especially those who have an income in excess of their basic needs.
What you say is correct at present: BTC marketcap is still small and insufficient to rescue governments from public debt. Governments will still have to print more money out of thin air, and inflation will continue to exist and worsen. Only those who invest in BTC will benefit from its price increase, as they have chosen to hold an asset of extraordinary value over time.
Another typical case is the success of El Salvador after adopting BTC at a national scale. El Salvador has attracted more tourists, received more investment to develop the country, and paid off its debt. This is a beautiful scenario for a small country with a GDP of only a few tens of billions of $.
However, in the future, BTC could truly change many familiar things in the economy: BTC could become the standard for fiat, meaning that governments cannot arbitrarily print more fiat because everyone can check on-chain data about the government's BTC reserves. BTC could also become a valuable asset class like gold, and governments could use BTC as a tool to strengthen their national financial power.