If even half of the ETH tokens deliver on their business cases

I wholeheartedly agree. But as someone who has created multiple ERC20 tokens, that is a pipe dream. The absolute best case scenario is 10% of all ERC20s delivering on their business cases, and even if that were to happen (it's closer to 1%) we must also consider that ERC20 and Ether in general is an extremely speculative investment, meaning that you buy the hype and sell the news, because the news is always weaker than the hype.

It's over for Ether.

It might hit $500 again but it's never going to $1400, the same as the other 99% of coins that have pumped and dumped.