Look at the price of ETC yourself.
A prediction market, like Augur -- but this one made it to Forbes somehow.
They say that in the long run, time in the market beats timing the market. With the short term direction you cannot know for sure - even technical and fundamental analysis together with Reddit sentiment can only give you what's likely, not what's hundred percent sure.
It's always different until it isn't and it's never different until it is.
The surveillance section of EtherIndex's rule change (which after the Winklevoss' BTC ETF seems to be the key part) proposes a strategy which might be more plausible.
With ZCash on Ethereum (ZoE) a fundamental change in ETH is possibly ahead.