In recent days palkadot too got added to the list. Everything has got its importance and value. The market dominance hasn't decreased at any point due to the rise in the gas fee. This means people believe in the potential and the development of ethereum over any other cryptocurrency available in the market. If there is decrease in the dominance, then we can state some other cryptocurrency is gonna take the lead against ethereum. For now there is no altcoin to take the position of ethereum.