Or you use Ethereum, get confirmation in seconds, using far less electricity.

The only complaint valid in that case is the changing price, but it has been stable for months, and it has grown a lot more during the last year than the same investment in a savings account.

So what you say is essentially correct about Bitcoin, but if you add cost of opportunity to the equation, you have lost a lot more than people using criptocurrencies.

And the criptocurrency of the future can be different to Bitcoin. All bets are off.