One of the main reasons why Bitcoin has more worth than any other cryptocurrencies is because it has the proven track record to secure hundreds of billions of dollars ($269 billion as of Dec.8 ) without getting it lost to theft or accident.
If a person manages to successfully hack Bitcoin, he or she will easily top the Forbes Billionaires List at #1. And believe me, people have definitely tried to get this money that Bitcoin holds right now.
No other cryptocurrency has been held to the same amount of scrutiny and stress-test as Bitcoin. Lets really test the limit of this technology.
Good or bad, Im extremely excited what we will see in the future.
I hope you are too.
I don't know why bitcoin is the most valuable cryptocurrency in the world, but i guess it is because the earlier adopter bought it with high price,
so the current price is high too because no one sell it lower than they bought. There are many coins with a better spec indeed, but bitcoin is the most well known coin.