When i sign up to Bitfinex , they required minimum deposit $10k and this is very different with others exchanges that allow trader to make deposit by minimum coin equivalent $10 or $30. $10k big number for newbies trader, between all that exchanges  i  used Binance, Bittrex and Poloniex. Bittrex and Poloniex is first exchanges that i used for crypto trading 2 years ago. We have to use several different exchange to minimize risk from issue of hack.