The total market cap for all cryptocurrencies just surpassed $100 billion. The vast majority of these gains have come in just the last few months — on April 1st the total market cap was just over $25 billion — representing a 300 percent increase in value in just over 60 days.
While some of these gains are from bitcoin itself (BTC is up ~160 percent in the same two-month time frame), other digital currencies like Ethereum are also responsible for the increase, which on its own has increased ~439 percent over the last two months.