I find it sad to see this type of negative comment on a site dedicated to technological innovation and entrepreneurship. And I'm saying this as someone who doesn't plan to invest in Ethereum.
There's plenty of quacks calling themselves innovators and entrepreneurs. We should pride ourselves in taking a critical eye to things, and the OP isn't the only person to smell the unmistakable funk of a scam in this.
Ethereum is undeniably innovative (the first crypto currency that incorporates a Turing complete language). It certainly is a very risky investment but a scam?