BTC is not only the first coin but it has symbolic value for the entire crypto market, one symbol of the blockchain revolution.
Just like gold, there are thousands of metals produced such as steel, aluminum, silver, etc., which are widely used in daily life. but gold has always been the most valuable metal, still number 1.
So there will be no altcoins that can replace BTC although ETH, Sol, Tron or Xrp... have utilities, applications and technologies that are far superior to BTC.
Honestly speaking i don't think the same, see the strength and the time span in which these other coins have taken over the market Sol has reached in top 5 in just a matter of 10 months, with this much potential in altcoins i am sure there will soon be a time when alts will surpass bitcoin because of their utility, i am sure it won't happen very soon, it might happen after a lot of years but will happen for sure one day.