https://www.coindesk.com/markets/2021/12/19/how-to-be-a-crypto-samurai/ Five years ago, there may have been more than a few cryptos out there, but bitcoin accounted for roughly 95% of the entire market capitalization of all cryptocurrencies. In early 2018, it was just about a third of crypto’s market cap as the initial coin offering (ICO) boom led to a plethora of new entrants. Many of the early alternatives died out but others did not (hello, ether).  As recently as a year ago, bitcoin boasted 70% of the aggregate market cap. Today, bitcoin has only a little above 40%.