During the last weeks the cryptocurrency market proved to be very volatile: driven by the negative performance of Ethereum, which went from $300 in the late June to $134 on July 16th, the majority of the coins lost between 20% and 50%. Panic made people fear cryptocurrencies and many investors decided to sell their coins: this caused a chain of sell orders which made the market cap go down (from over 110 billion) to 60 billion dollars.