Coinbase Asset Management - Index funds, but for cryptocurrencies 💸
CityCoins - Add your favorite cities to your portfolio and earn BTC
Poloniex - US-based cryptocurrency exchange with maximum security
Robinhood Crypto - Zero-fee cryptocurrency trading from Robinhood 💸
Investing.com Cryptocurrency - One-stop-shop for those interested in cryptocurrencies.
Bittracker - Simply crypto tracker lets you compare value to luxury items