This is so really hard to say special cause its difficult to explain specialty in short word
Some of them are given below:
Its a type of currency which know as peer to peer currency and this permit to send and receive money without help of broker or third party involvement
Every bitcoin holder can review their account information after sending money or receiving money from their account.
After all kind of transection bitcoin recorded sufficient proof of every client and account holder through different facilities.
Buying and selling process is so much easier than other currency
I think above mention quotation is sufficient for proving that how much special the bitcoin is.
It is probably because of the fact that bitcoin is one of the first cryptocurrency to be effective on the internet. Also, the fact that many people are intrigue by the whole idea of investing on bitcoin because of the profit that it gives makes it more popular, and with popularity comes with demand. That's why it is special than the others.