Only for speculation and money laundering. Bitcoin's exaggerated volatility makes it unusable as a currency. If it would you wouldn't be making fun of the guy who spent N bitcoins on 2 pizzas instead of holding it. And conversely, if everyone would hold bitcoin, it wouldn't bring any utility to society.
Equating the cost of Bitcoin and aluminum doesn't seem like a sound argument unless you can also equate the value (or show that they are approximately close.
Could you credibly claim Bitcoin brings the nearly the same value to society that aluminum does?
Bitcoin mining results in heat, both literal and metaphorical.
Do you have any proof of this dubious statement?
The idea that you can send "money" to anyone regardless of who you or they are does provide some value. Unlike any other financial transaction system that proceeded it that I'm aware of, you can't be deplatformed from crypto.
How valuable you find this likely coincides with the value you place in the ideas of crypto (the original definition) anarchy.
As it stands, crypto currencies are a promise, not a fulfillment. They will become a fulfillment after they actually solve those problems. But it's a long way from theory to practice, even after all the technology is deployed.
https://www.schneier.com/blog/archives/2019/02/blockchain_an...