nope, Bitcoin is a central of any cryptocurrency nothing any altcoin can placed 1st position in cryptocurrency than other, even any speculate from pro trader, specualtor, investor or another shit people
Yes no one can overtake bitcoin as the top crypto existing, because it is the king and started it all.
On the other hand eth is also on top of the altcoins and one of the reliable coin just like bitcoin. Hence I think we must be contented on the spot eth had, in the future it will rise too together with bitcoin and other established altcoins.
The comparison of Ethereum with Bitcoin is totally wrong, you can compare Eth with other altcoins like bitcoinABC , BitcoinSV, etc. Bitcoin has no competitor yet because of its decentralisation and fluctuations. Bitcoin has potential to give you 1000$ profit in just few hours while in case of ETh you should hold for at least 6-7 months or may be year.