Yes, you are absolutely right. Bitcoin uses lots of electricity. This is frequently repeated by people entrenched in the naysayer camp.
Have you considered the huge amount of energy consumed by traditional financial transactions. Those big bank buildings downtown. The millions of credit card machines next to millions of cash registers using electricity just waiting around for the next customer. Server farms at Visa/Mastercard/Paypal/etc.
Financial transactions require energy. True. But don't forget that it applies to government money also.
Cryptos are working on improving transaction speeds and costs. The promise of cheap solar suggests cheaper energy for everyone as we look forward into the future.
How profitable has naysaying been for you. Don't you wish you had joined the other side 6 years ago?
100 years ago there were surely people riding horses who thought cars were for fools .
Paradigm shifts are tough. Bitcoin may not be the ultimate victor, but cryptocurrency/blockchain tech is here for keeps.