Btc is not backed by electricity. There is no system set up where you can trade Btc for electricity in universal and unchanging way. For example, the original dollar was a silver certificate. You could trade one silver certificate for an equal amount of silver. That amount never changed and was universally accepted across the entire U.S. That is a currency that is "backed" by a real tangible asset. Btc does not have that at all. Btc is not backed by anything.

I will agree that crytocurrencies are better than our current oil dollar in many ways, but it is still a very, very poor means of intermediate exchange in trade (currency).