I believe bitcoin will still dominate in the market because it influences other coins.As the price of bitcoin is up, altcoins follow.And when it is down,other coins are down too.With that basis alone, I don't think other coins will overtake bitcoin in the top.
According to me Gradually, it can be overcome with other coins like eth, ripple, bitcoincash, etc. In the coming years. More recently, eth creates higher investment returns than bitcoin, and it's the first sign of this change in the crypto market.
It should be realized and accepted that there are so many other coins on the market today. These new coins become bitcoin direct competitors. Investors have more options to invest they want but today for the next few months or years, bitcoin will remain number one as the first choice, still the most interesting coin to be invested and best known to people.