We don't know if something beyond Bitcoin will be created and perhaps take all the attention for itself.
I always think about this, but then my thoughts are concluded on a line that I say to myself: Can anyone be as selfless as Satoshi? And, the answer I give myself is always a big NO.
There might be minds and brains that can create something technically better, faster, and more cost-efficient at all times, but will they be able to create it and make it fully decentralized? And keep no supply from it for themselves that they could use when it starts gaining value? Will they disappear from the scene instead of trying to gain as much publicity and attention as possible for what they've achieved?
All these questions you ask yourself make you realize what a great mind Satoshi was (if he was a single person), and how selfless he was, never cared about attention or money, only wanted to bless us with a system that we can use as an alternative to traditional financial systems with no incentives for it going to him.