What is a cryptocurrency? We need clearer definitions
Cryptocurrency is a term describing digital currencies based on blockchain such as bitcoin, ethereum and ripple. 29 blockchains solve the double-spending problem without the need of a trusted authority or central server , assuming no 51% attack (that has worked against several cryptocurrencies). A cryptocurrency wallet stores the public and private "Keys" or "Addresses" which can be used to receive or spend the cryptocurrency. Most cryptocurrencies are designed to gradually decrease production of that currency, placing a cap on the total amount of that currency that will ever be in circulation. This makes ethereum more a family of cryptocurrencies than a single currency. Few people know, but cryptocurrencies emerged as a side product of another invention. For example some coins offer fully private transactions and some don't use blockchain at all. Exchanges like okcoin, poloniex or shapeshift enable the trade of hundreds of cryptocurrencies their daily tra...