can anyone explain to me -

[bitteriest]

Why bitcoin worth more than other digital currencies ?
If anyone can now use the infrastructure of bitcoint and create a new coin , what makes the bitcoin so special ?

[kriwest]

The network effect. It was first, it has the largest community of users, the biggest investors, the most trust, media attention, etc. Which makes it that much harder for other coins to compete.

[mprep]

Bitcoin was the first. It was the one from which all other coins were created. The original idea (or the best implementation which still is Bitcoin) always gets the credit, while others just bite the dust.

[bitteriest]

So this is a very bad reason
Altavista were the first search engine until Google came....
That's the only thing that makes bitcoin so worthwhile ?

[RoadToHell]

So this is a very bad reason
Altavista were the first search engine until Google came....
That's the only thing that makes bitcoin so worthwhile ?

No.  Being the first is what got bitcoin going.  Having the set of attributes that bitcoin has (which I am not going to list and can be found elsewhere) is what has people trusting in it.  It has momentum and trust of users.  If another identical coin appears it does not have the value that an established trusted coin has.  There is no reason for anyone to switch.  If another coin with superior attributes appears... well we will see what happens when that occurs.  Most likely, however, such a superior coin will be an improved bitcoin (i.e. compatible).

[jeppe]

It was the first all the other ones are copycats

[The 4ner]

It has the most users and investors.

[djkorova]

It also has the best name.

[mprep]

So this is a very bad reason
Altavista were the first search engine until Google came....
That's the only thing that makes bitcoin so worthwhile ?

I did mentioned another thing. See bold text bellow:

Bitcoin was the first. It was the one from which all other coins were created. The original idea (or the best implementation which still is Bitcoin) always gets the credit, while others just bite the dust.

[Peter R]

Why bitcoin worth more than other digital currencies ?
If anyone can now use the infrastructure of bitcoint and create a new coin , what makes the bitcoin so special ?

The infrastructure of bitcoin is now so much more than the code base.  

[LiteCoinGuy]

most and best devs and network effect. second best is Litecoin.