I won't judge into that conclusion that there are no projects like Bitcoin. There are projects that have big ecosystem than Bitcoin but being the first has its own privilege. It is not that easy to buy 1 Bitcoin at it's current price in today's market price. Whereas it is easy to buy some of the cryptocurrency that are working for the betterment of other big crypto ecosystem.
I may have exaggerated my terminologies but I stand on that mate that there are no other projects that will grow as high as bitcoin that started to almost no value and now standing at more than 73 thousand dollars and has that capitalization of almost 2 trillion dollars(at least not in the next 5-10 years mate) though I respect your position and hope that you also will respect mine in this matter.
and also lets see and come back after 5-10 years hahaha.

You are not exaggerating, there will never be another cryptocurrency like bitcoin, if there is at some point another form of money that is created and that is superior to bitcoin in all aspects, then even if I do not know how such a coin could be created, what I do know is that such a coin will not be a cryptocurrency but something else.
So as long as a coin is created using bitcoin as a reference, then that coin will never surpass bitcoin, as there is no way that a copy can surpass the original.