Bitcoin has tons of intrinsic value unique to crypto currencies that traditional currencies lack. Most importantly it can't be created/destroyed at will by a central government. Huge sums can be transferred globally at the speed of light with very low fees. Can't do that with gold or cash. With normal currency a wire transfer costs money and moving a lot of money from a bank account usually takes days. Also you can store a lot of it yourself, relatively securely compared to storing hundreds of thousands of dollars yourself. Oh and it's also backed up by a global ledger that is country or government agnostic. The electricity it takes to maintain it is nothing compared to the rest of the banking system. These properties are the very nature of crypto, that's why it's intrinsic.