The reason for that level of sucess is because it does better what it proposes to do, which is to be a good store of value and censorship resistant. Most other currencies try to do the same, but there is no way for them to achieve this being so centralized.
Yeah, your right bro bitcoin is centralized and bitcoin is so easy to use and the security of the users are fully protected than to the other currency. Thats why i choose bitcoin as a trusted currency.