No one could take off the crown in bitcoin my friend, and I assure you with that. Even tough there are lot of alt coins out there, people will always remember that without bitcoin none of the could eventually exist. Even there are crypto that could surpasses the price of bitcoin (which i think is impossible at the moment) still people will honor bitcoin and see it as the king of all the crypto no matter what happened.
You are right that no one would take off the crown since bitcoin is the first cryptocurrency that has been created, but if most of the investors will focus on a different coin then there is a huge chance for another altcoin to rise above bitcoin.