So far, three cryptocurrenciesBitcoin, Ripple, and Ethereumhave hit a market cap of $100B. Notably, they all did so within three months of each other. These cryptocurrencies first hit market caps of $10B in 2013, 2017, and 2017, respectively. Bitcoin reached the $10B milestone almost four years before any other cryptocurrency, but the $100B milestone only three months before its competitors. At least by this one admittedly imperfect metric, Bitcoin is losing its lead.