There is no "drop in Blockchain". The only drop is in the crypto currency fraud that happens to use blockchain technology.

Crypto is just another tulip mania. As the number of crypto miners decreases, the number of ledger copies decreases and when the last miner calls it quits because it's uneconomic, the ledger disappears into the ether along with any phony value people thought they had. The Central Bankers are wondering why they never thought of inventing another form of out of thin air "money" which crypto is.