No, unless society is used with cashless/electronic payment method and most people have smart device with internet connection. Also, cryptocurrency is practically useless in poor country.
I don't agree with your assertion that cryptocurrency is practically useless in poor countries, because any where in the world as long as you have an internet connection and a smart device you can carry out digital transactions. And as long as you have the knowledge of cryptocurrency and bitcoin most especially you are good to go location don't matter in cryptocurrency once you have what is needed you can carry out your transactions unhindered.
Yes, as long as you want to become a cryptocurrency user, a worker on this forum or other fields but related about cryptocurrency to make money, you all can have chance to get money and change your life. I have many friends from poor countries in Africa, they always want to change life, so, they accept to spend more times than me to working on this forum and anything can earn money through internet.