And what countries with the problem of the economy are you talking about. If for example these are African countries, then there is not everywhere an Internet to use cryptocurrencies.
I don't think at the moment we haven't talked about any country. however, we are only talking about the potential of bitcoin that can be used to fix economic problems in a country. if that happens to individuals, or organizations, then that can also happen to a country. only, until now there has never been a state that tried it. so far they have only supported the development of this technology.
But if that potential has been approved by many underdeveloped countries, then bitcoin will not quickly operate there because it's true that the availability of the internet is the main one for this development. But even so I'm sure it is a problem that is easily overcome and for the development of bitcoin will require a long process to make a good understanding for them.