Right. Satoshi Nakamoto created Bitcoin. He's a genius. Bitcoin systems and communities are working perfectly, and everyone is crazy about Bitcoin. But what happens if someone creates a blockchain that is faster and better than Bitcoin and puts it out into the world without any greed, as Satoshi did? Are people going to ditch Bitcoin away? In that moment, we're going to see a blockchain that's performing better than Bitcoin and is perfect for decentralization that everyone emphasizes. What will happen?
Let's think a little. Do you still use your old Nokia from 1998? I guess not, although 2G is still supported by the GSM network.
If something better, faster, safer it's invented, it has the potential to replace Bitcoin.
But keep in mind that for this it also has to be
at least as profitable to mine as Bitcoin is, else the miners will not change, hence the network safety (for the new coin/system) may not become safe enough.