which bitcoin trading platform is easy and reliable
For me the easy and reliable trading platform are c-cex, poloniex, bittrex, novaexchange and alcurex, these are the exchange trading platform so far that I am using it by now.
I think everyone has their own choice, but tome I personally using C-Cex, Poloniex and bittrex, as I found these more reliable and trusted exchanges for long period of times, never found any issue with them. I guess all the exchanges which are having support topics here are good to trust with them.
Never trust too much even they are reliable run the exchange for years.
Take a look to bitfinex or the giant mtgox, they are collapses in the end leaving their amazing reputation.
Hacker everywhere but also bad intention of the exchange owner always there once there is a chance to do it.