The way and manner of speed ETH bullish at times makes me feels one day, the pump price ratio of ETH may outgrow BTC not in terms of how much is BTC or ETH? But the ratio speed of pumps per bull.
Altcoins are more volatile than Bitcoin. So, it is not very surprising if the ratio of ETH pump price can be higher than BTC. However, ETH is always following BTC price development, everything depends on how BTC price trends. If BTC price continues to increase and even can make a new ATH, then ETH seems to experience the same way. While if BTC price tends to decrease gradually, it will be a very small chance to see ETH price grows significantly.
I think it would be possible for bitcoin to stop growing eventually but ETH keep on growing after that. Not saying that it will get over it, but it could get close to it which already happened. We were closer than this back during the bull run, the reason for that is the fact that it requires less money to increase ethereum whereas it requires a lot more money to increase bitcoin. To make bitcoin go double, you need twice as much as you need to make eth double in price.
Obviously the closer they get the closer the requirement becomes and that is why it doesn't happen, but I believe that we will not be seeing anything like that anytime soon, it should be pretty tough to have anything in that regard and maybe we will see something better.