To be honest, I would stay as far away from Bithumb as possible. Too many security breaches (at least two successful hacks) and more than USD$31 Million stolen by hackers (that's the disclosed number; who knows how much hackers had stolen in 2017). That's not an ideal platform to put your money on to, in my humble opinion.
I would add Bittrex as welltrading for two years on that exchange, and never had an issue, it is one of the top.
You are right. I Don't know why everyone suggests and supports Bithumb exchange. Such a bad crypto exchanger it is. This exchange already hacked two times this year, and hackers took 31 Million USD, We can see another hack in this year, who knows. Bittrex is far better than this overrated exchange! I will never trade in this exchange because I don't believe, even they can steal user's money and then announce hacker hacked everything! We really don't know about it.
Bithumb was a great platform... I use it for a period as loyalty or something