Bitcoin can not become a serious replacement currency, as no government can ever give up control over monetary policy and would rather put away lots of people than allow any threat to how things work.

If you know nothing of computers you might find articles that explain Bitcoin briefly and then point you to a "wallet" that you can download and to various exchanges where you can buy Bitcoin for real money. Why not give it a shot, and "invest" a bit? You need to know quite a bit to understand the unfixable problems with computer security, and read a little to learn of the cruelty of the cryptocurrency world: no password resets, no deposit protection, no sympathy when you lose your money.

It will take time... Computers, Internet and new techs in general aren't mainstream in their beginings. Do you expect it to be perfect from its inception? Even planes crashed on their first flights, and look at us now, flying everywhere.