The Flippening will be the opposite of what you think.
It's clear that Ethereum is performing great, with now more than 80% of Bitcoin Marketcap. Huge achievement that no one can ignore. Various reasons helped Ethereum gain such momentum, including its flexibility and Assets built on its blockchain. While Bitcoin is in the scaling dilema, Ether is skyrocketing.
However, in the crypto land things change and flip quickly. Everyone is talking about Ethereum overtaking Bitcoin soon and the flippening process starts as it pass the marketcap. I see it differently. Ethereum is already in a bubble after months of gaining value. Same as Bitcoin in 2013. The breakpoint is soon to happen and value will transfer fast to Bitcoin and Ethereum classic.
It will be the opposite of most people prediction.
Have fun and enjoy the ride.