When the Wild West was around Medicine was used as a scam too. Snake Oil salesmen aren't very nice people. But that doesn't mean medicine is a bad idea ya know?
I agree that there are a lot of snake oil sellers in the cryptographic currencies realm. But that world is basically the digital wild west at the moment to me. I too am waiting to see what happens.
To my understanding, the older cryptographic currencies are the energy consumers. Newer models have avoided the massive energy consumption. A.k.a Proof of Work vs Proof of Stake.