Decentralization can only be global in part. Perhaps it will be for some products and areas of activity. Cryptocurrency has gone very far just to disappear.
Nowhere cryptocurrency will not disappear. This process is already running. Most of the current projects either disappear or transform into something else. But the cryptocurrency technology itself and the idea of decentralization came to us seriously and for a long time!
I agree with you, the crypt and the blockchain technology have very great prospects, and I think that we are only on the initial path of development of this technology.