Ethereum being the coin that has the most opportunity to become the king of cryptocurrencies beat bitcoin, I believe even though the expensive transaction fees will not prevent investors from investing in Ethereum because of the large profit opportunity and certainly safer than investing in other coins.
Have you forgotten that Bitcoin also has other unique things and can make transaction fees cheaper than Ethereum which will further strengthen Bitcoin in the top position, because what Ethereum has to beat is the real king who has been in the market for a long time cryptocurrency, because if Bitcoin is destroyed, then the future of Altcoins cannot be guaranteed to survive, for example like now when Bitcoin is being corrected a lot in the market.