According to the report of Goldman Sachs, Bitcoin and other crypto-currencies can be a good alternative to the national currency for countries with an unstable economy.
It can help somehow specially those countries with hyperinflation status like Zimbabwe and Venezuela were money almost useless as a tool to purchase anything. In that case Bitcoin will soar because of the demand, and people in that particular country can enjoy the benefit of it. The only question is, will their government will allow circulation of cryptocurrency?