Some look at the enormous value of a single bitcoin in the tens of thousands without fully understanding how a single "coin" could garner so much fiat money. A thing often forgotten is the reality of supply and demand.
Bitcoin has an extremely limited supply compared to most cryptocurrency. The causes a much higher demand and value. Of course it didn't hurt to be the pioneering first to create crypto in the first place.
Below is a handy comparison of supply & relative demand.