Poloniex is just tthe exchange site, when you are considering safety and security as it uses KYC and two steps verification to authenticate its users. To startup, you need to register, registration is an easy process, friendly though. On this platform, bitcoins, ethereum even tron and other altcoins. It accepts credit card, devit card for deposit. It was launched in 2014, in San Francisco. Poloniex doesn't accept fiat currency and tokens, it has a downloadable app which can be gotten from Playstore and us compatible with android and iOS. It is one of the largest exchange platform in terms of volume. It offers a low tradibg fee generally. It offers a withdrawal fee of 0.0005 BTC. The security is just okay. It is your email that is required for registration but it doesn't give users complete access to everything. There is availabilty of margin trading, it even allows users to borrow money with interest. It offers wide range of coins to exchange and trade. It offers wide range of coins to exchange