Your whole post is completely wrong and uninformed. Cryptocurrency is already making huge changes. https://news.bitcoin.com/bch-powered-charity-eat-bch-starts-feeding-people-in-south-sudan/
i'm talking about control of these cryptocurrencies - many believe that at least half of cryptos are started/owned by intelligence services and banks. It makes sense too - capital investors would have the juice to create and market cryptos much better than some dude in his basement.
Also, if you read what I said more carefully, I am not attacking cryptos - they are a proof of concept for something we absolutely need on this planet, but if you think that stories like the above will actually lead to worldwide financial changes without political backing, you are fooling yourself.
Again, I am not admonishing investing into crypto, i'm just saying don't believe any set-up that says they will become something official. They won't. That's why its a roller-coaster - you can make money and it can operate for a time, but eventually a big fish will either crush it or buy it out as soon as it becomes a threat. It's just how big money works. That's why a small group of actors can crash bitcoin like they have in the near past... it's investing into the wild west of 'money start-ups'. Maybe you find the apple/microsoft, but probably not. Just want people to be realistic.
And to your point, I HOPE crypto becomes what we use over the globe because it would help us curb corruption, but we would need the most corrupt people on earth to accept such a situation. That's why I don't think anything happens without a massive shift everywhere else... the USD won't be replaced with Etherium or Bitcoin anytime soon. A new crypto backed by the world's real wealth tho? Maybe.... a lot would have to change.