It is not impossible for any alt coins that might replace bitcoin, but it need times and hard work. Bitcoin reaches their value after a long time surviving in the crypto industry and its same rules for any others alts.
it's more about infrastructure, integrations, bitcoin is older.
I dont get when people say 'replace' what the coin get for the higher market cap, a medal?
it's not about profit too, cause many other coin perform better than btc...
the cap doens't mean that much
is it being used outside the exchanges?