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.
Indeed. Also, in addition to that, as we all know, bitcoin was the first cryptocurrency to be established in the world that makes it special among all the cryptocurrencies which are just inspired by the establishing of bitcoin. It is special among all the cryptocurrencies because of the benefits it can give which attracts manh people to get engage with it. The price also makes it special because as we can observe, it is the cryptocurrency that has the largest potential to grow and as we can see, it has the highest price in the market.