Here is a list of sites I used to gather information about crypto currencies
Subreddit for crypto currencies
https://www.reddit.com/r/CryptoCurrency
Hackernoon has two good articles about crypto currencies and the blockchain as a triple-entry accounting system
https://hackernoon.com/a-primer-on-blockchains-protocols-and-token-sales-9ebe117b5759
https://hackernoon.com/why-everyone-missed-the-most-mind-blowing-feature-of-cryptocurrency-860c3f25f1fb
Extensive study about crypto currencies from the university of Cambridge
https://www.jbs.cam.ac.uk/fileadmin/user_upload/research/centres/alternative-finance/downloads/2017-global-cryptocurrency-benchmarking-study.pdf
Statistics about crypto currencies, the first has wonderful pie charts :), the second a good statistic about the overall market capitalization of the different crypto coins and the third also has a good informed user base
https://bitinfocharts.com/cryptocurrency-charts.html
https://coinmarketcap.com/
https://www.cryptocompare.com/
List of crypto currencies on wikipedia
https://en.wikipedia.org/wiki/List_of_cryptocurrencies
Ethereum wiki
https://theethereum.wiki/w/index.php/Main_Page
Coinbase crypto currencie exchange
https://coinbase.com
