If everyone around the world gets into cryptocurrency, do you think it will even help in solving or lessen socioeconomic problems? Can it be used to buy goods from other countries? It is fair to say that crypto will help a lot of people but what will it do to one's country? Will it help improve a country's economy?
Broadly speaking - Bitcoin solves the problem of verification. It allows getting verified answers from a group of untrusted individuals (See my answer here for details on How Bitcoin Mining Works), instead of trusting a single authority to do the verification.
Narrowly speaking - Bitcoin is focused on the banking/financial system. It is meant to facilitate financial transactions directly between peers without clearing them through a central bank. As an open 'democratized' system, it should also reduce fees to the minimum the market would accept.