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!
Also do not forget about Blockchain. Blockchain, together with the cryptocurrency market, had time to take deep roots. And this is just the beginning.