I'd still be waiting a bit for ETH to establish before jumping in. If you watch the graphs for the price of ETH in last 3 months, it's steadily decreasing and a line drawn on the changes would put it's price much lower than the last weeks depression. Though anything below $250 would be a buy as we are having a jump after a fall.
It is all about the right timing and the introduction of corporate money into the crypto game that is being played, everyone was betting on those possibilities.