I don't think I agree with you on this. The basic reasons behind why bitcoin is more valuable than other cryptocurrencies are;
1. Bitcoin introduced blockchain technology which led to the introduction of other cryptocurrencies.
2. Bitcoin is the father and king of all cryptocurrencies.
3. Bitcoin introduced financial freedom to everybody no matter your social status.
These are very well said, Well, in my own opinion and I think it's because Bitcoin is the first cryptocurrency the reason why is more worthy rather than other cryptocurrencies. Also, many people trust Bitcoin and there are a lot of demands for it even if the price drop down it is still number 1 and no one can replace it. Another conclusion, because bitcoin was an open-source code and there are many developers who try to have an improvement on it.