Added a cryptocurrency resource under section "Web-sites" (#139)

README.md

@@ -428,6 +428,7 @@ encryption library providing MD5, SHA1, SHA2 hashing and HMAC functionality, as
 - [Cryptography Stackexchange](http://crypto.stackexchange.com/) - Cryptography Stack Exchange is a question and answer site for software developers, mathematicians and others interested in cryptography.
 - [Cryptohack](https://cryptohack.org/) - A platform with lots of interactive cryptography challenges, similar to Cryptopals.
 - [Cryptopals Crypto Challenges](http://cryptopals.com/) - A series of applied cryptography challenges, starting from very basic challenges, such as hex to base 64 challanges, and gradually increasing the difficulty up to abstract algebra.
+- [Cryptocurrencies Dashboard](https://dashboard.nbshare.io/apps/reddit/top-crypto-subreddits/) - A dashboard of most active cryptocurrencies discussed on Reddit.
 - [Garykessler Crypto](http://www.garykessler.net/library/crypto.html) - An Overview of Cryptography.
 - [IACR](https://www.iacr.org/) - The International Association for Cryptologic Research is a non-profit scientific organization whose purpose is to further research in cryptology and related fields.
 - [Learn Cryptography](https://learncryptography.com/) - Dedicated to helping people understand how and why the cryptographic systems they use everyday without realizing work to secure and protect their privacy.