But why ? Because it's the first cryptocurrency created, and the most used in the market ? What makes you believe that Bitcoin will be the eternal king of the market, and something else won't replace it ?
Obviously, Bitcoin has an incomparable advantage over other cryptocurrencies.
1) I know about it everyone who knows about cryptocurrency. He is popular.
2) His creator is anonymous.
3) Bitcoin is actively used as a means of payment (already!).
4) His number is always reduced.
5) Its price is always increasing (in the long term).
6) The rest of the cryptocurrencies go after him.
Therefore, it is clearly better than other altcoins.