Bitcoin is king because :
1) It was the first crypto coin. People associate crypto with Bitcoin.
2) It has a solid foundation. Developers made this coin with long term vision.
3) It is a good option for current investors alao because it proved its worth in last 13 years.
You forgot the main point: it's completely decentralized, so no one owns it. The fact that Satoshi decided to disappear was a game changer because he decided to leave his project to the community. There is no other crypto like bitcoin because of this. There are some other good cryptos out there but bitcoin is and will be unique.