https://www.zerohedge.com/technology/blackrock-flags-quantum-computing-risk-bitcoin-etfs
I've always (since its inception) viewed crypto currencies as being one bad idea compounding another: a house of cards built on quicksand. This article highlights my biggest objection. Quantum computing, when it finally reaches the public, will mean that crypto currency will eventually be produced much more quickly than demanded. In other words, its value will drop to zero.
There's a classic historical example. A few hundred years ago, there was hyperinflation in the price of tulips. One tulip bulb could produce only one tulip. With a limited supply, the price of tulips became astronomical. Then someone figured out how to make multiple tulips from one bulb. The tulip market collapsed, taking the nation's economy with it.
It's years off, but here we go again.
Alexander the Great was able to conquer much of the world based upon the discovery and exploitation of a silver mine. Because silver was a monetary metal, it was like discovering a grove of money trees. But the mine petered out. So did his empire.
The article's concern is with the hacking of bitcoin wallets. That problem too. My big concern is with the mining of bitcoin. It's like everybody will be able to walk up to an ATM machine and get a stack of cash, on demand.