That's never going to happen, even if ethereum upgrades to ETH 2.0 and introduce the proof of stake ability ethereum will still remain the number 2 on coinmarketcap and in crypto space, the highest this update can do is price surge
I completely agree with you, I think not only ETH, but also other alts will not be able to overtake Bitcoin, not now, nor in the future, Bitcoin will always be number 1 on the market and will always dominate.