What real world problem is bitcoin solving rn?
Trustless, world-wide and cheap money-transfers without any middlemen. Just a transaction between you and the recipient.
Also, you are the only one with access to your money. No entity which can freeze your money/transactions or revert anything.
and to what extent?
Completely.
This is a really reasonable answer and I like it.
You explain easily and simply and I understand it so I know what the OP question is