I don’t think Eth can takeover BTC. I mean , I have often seen people claiming that using of ETH is more complicated due to it’s separate blockchain and smart contracts etc. On the other hand BTC is as simple as that.
We can also compare BTC and ETH popularities and marketcap. These shows how more people are attracted towards BTC.
Moreover BTC are limited in supply, this drives more people crazy about Bitcoins and hence they are fond of storing or buying more BTC than ETH.
So I don’t think OP, it never gonna happen.