They are excessive but not 'literally useless' - there's clearly a use, it just would be a lot better if that use was being served with less energy.
Not that I particularly like BTC at this point - it has been largely superseded by better projects.
Not that I particularly like BTC at this point - it has been largely superseded by better projects.
And if we talk about pure payments, projects like Stellar, Nano (yes, issues currently but getting fixed), and Monero have clear (different) benefits over it.