I don't agree with you, I don't see ethereum will be able to flip bitcoin anytime. Ethereum market capitalization is very influential on bitcoin, when the price of bitcoin goes up, the market capitalization also increases. ethereum will definitely hit $10k (in the next few years) but bitcoin will definitely hit $100k too and that automatically makes bitcoin market cap bigger.
Note that Bitcoin's greatest strength is popularity. But people all over the world are constantly educating themselves about cryptocurrencies. Ethereum has many more useful things (like smart contracts) and is growing all the time. When Ethereum 2.0 and PoS are introduced, the situation may change dramatically. If there is a sudden bubble on Etereum, it can jump over Bitcoin capitalization in several months.