Let's cut the long story short.

When it comes to technical aspects, we might say that other alts outrank btc because some of them have capabilities of transacting more payments, much lower fees, higher market caps and other outstanding features depending to the platform they have. And yet, btc remains the king, why? Simply because it is the pioneer, the most adopted, the zenith. Even how hard the other alts try to improve their platform, they still remain on btc's shadow as long as they don't have the power enough to change people's perspective.