This article judges Ethereum as a potentially useful tool and author proves such a tool has no advertised usefulness in it so it's doomed. I think this is wron

This article judges Ethereum as a potentially useful tool and author proves such a tool has no advertised usefulness in it so it's doomed. I think this is wrong approach. Ethereum and most of the altcoins are not tools aimed to solve a problem. They are gambling machines. What matters for them is marketing, charismatic leader and wide audience (developers). Ethereum has all of these.