According to the CoinMarketCap.Com, BitCin holds the largest Crypto market Capital until today.
Ethereum is keeping the 2nd place, but it seems like they are trying to expand the market capital against BitCoin in current days, and also Ripple holds 3rd position with 10% of the market capital as well.
IOTA, BitShares & Monero reserved their positions in top 10 Crypto market caps as well.
To read more about Crypto Market Capital please refer the below website.
https://coinmarketcap.com/