Bitfinex is the world’s largest and most advanced cryptocurrency trading platform operating since 2013 in this space. It is based out of Hong Kong and serves almost every country in the world. Bitfinex follows the maker & taker fee schedule for the investors trading on their platform. This fee structure is outlined on their website, and is based on the amount traded. Account minimum is currently at $10,000 USD to be able to start trading, and the account verification process to open all the features can take some time. They have had a bad history with hacking, but since then have upgraded their security framework. The platform has many tools and functions, but needs some learning to fully master. Because of all this, Bitfinex is designed for experienced traders with a significant amount of trading funds.