I do think that in the long run, at the point that people will get more familiar with cryptocurrency, people will see that bitcoin really isn't the best out there and that bitcoin got to this point simply because it is the first and people only know about bitcoin if they have heard of cryptocurrency at all.
So that being said I geus that in the long run (2-5 years) I don't see bitcoin at the top, I see Ethereum and [insert fast coin made for use as a valuta] in the top, cous thats kinda the 2 reasons blockchain exists, the way Ethereum uses it and the way its being used as a valuta kinda thing.
Good for you! And I hope you have invested in all the altcoins you can today and you have left out bitcoin. I would want to see how that ends up turning out for you in the future. Bitcoin is where it is today because people trust it. The fact that you keep taking about some altcoins overtaking bitcoin, one thing you have to understand is that the only thing you are doing at the moment is to just make the developers richer as they really do not add any value at all.
I simply do not know what is in the future and no one knows, but any smart person, would obviously want to take their bet mostly on bitcoin before even considering any shitcoin at all.