Of course I’d affirm that this is very possible. It is possible because everything that has even been made by man was an idea at first. Bitcoin was just an idea and people haven’t stopped imagining. So tomorrow anyone can come up with something similar yet better than Bitcoin. But Bitcoin’s height in use case isn’t a cheap one to achieve.
Considering most institutional investors which has hundred millions of dollars or even billions in their hand still allocate big chunk of that to bitcoin, I think none can surpass the market cap of bitcoin.
I think you’re failing to understand that Bitcoin is an idea that was brought to life, before it existed, no one would believe it too. They thought what was available was the best and most powerful because probably, investors also put a lot of money into whatever it was. But we’re in a world of endless innovations. Just like Bitcoin came and stole the show, anything can do the same. The world is evolving, the ideas and technology gets better.