Well, I don't see the possibility of having any coin that would show similar properties as Bitcoin in the future. Bitcoin happens to be a major part of evolution of money that has changed the financial industry with strong protocols in place. Morever, the entire story behind Bitcoin that has made it a success till this day is kind of complicated, which makes the possibility of having a coin that could hold such dominance nearly impossible.
I think most of us are happy with the Bitcoin and we aren't expecting to see any competitor because they won't be any. If there should be any other financial impact that would be coming in the future, then it might likely not be in the form of crypto currency. Bitcoin dominance is nothing to compete with.
We can't predict the future, friend. Bitcoin has proven itself as a top cryptocurrency to invest in, but it's not without flaws. Over time, important features like privacy and decentralization have been gradually reduced. We can't guarantee that Bitcoin will always be the best, but it currently holds a strong position, even though many altcoins haven't surpassed its features. The idea is investing in the most profitable and that which provides us with more features and for now, none. We'll have to wait and see if a new coin emerges with more to offer.