Mate thing is different now compared to the 2017-2018 Bullish period. Because the growing price of Bitcoin today is due to the institutional players/investors that pouring some capital into the market thats, why we can't, say that this price boom is just a bubble, Its the same as Ether actually Eth has already breached the $500 dollars price level today. I believe in December things might change in all top-ranking cryptocurrencies in the market If Bitcoin price continues to grow top altcoins will also grow next.
Now we hearing good news related to bitcoin after every few days. Like large investment from big institution and billionaire, newly adoption at various platform. These helped bitcoin to gain strong position and huge growth. While ethereum don't have any recent good news. Even the eth 2 launch is obscure. Gas fee mostly remaining high. So I think it will take longer time for eth to increase like before. Maybe not this year. And bitcoin will gain more strong position than ethereum within the time.