One of my underwriters is a whiz when it comes to cryptocurrencies and got me into it. Ripple, Trx, and a few others have literally made thousands for me which I'm not going to complain about!

https://www.binance.com is definitely the best exchange if you have coins already and wanted to trade Alt coins, but like cash cat said GDAX is the best for BTC/ETH/LTC(And if you trade on limits you'll pay no fees).