You're dismissing a whole branch of computer science on decentralised systems with no argumentation as to why. Consensus algorithms, solutions to the CAP trilemma, uncensorable decentralised applications that run as long as people are willing to use them, trustless oracles, decentralised dispute resolution, democratised loans and finance. Those are some applications that grew out the cryptocurrency space.

On a somewhat related note, I just wonder for my personal interest, why do you write it that way? "BitCoin". You are just signalling everyone that you haven't done any deep research, you have not read any meaningful amount of articles or books or studied it in depth... It is spelled "bitcoin". "BitCoin" is how a housewife would spell it (no disrespect or negativity towards housewives, it is simply an example of a person who does not know much about bitcoin and has just heard the name on the tele or something).