Bithumb was founded in 2014, but maybe you heard about them because they got hacked many times, and on September 2, Bithumb was also raided by Seoul Metropolitan Police.
Yeah, I recall the latter raid.
I have no feeling about this either way, because I'm expecting there to be a lot of consolidation among the exchanges all over the world. There's just no room for all of these little ones that exist--the ones most likely to fake their trading volume.
Think about how many stock brokerages there are available if you want to trade stocks. In the US, there are a few but there aren't hundreds. In cryptoland, I don't know how many exchanges exist, but I'm pretty sure the number is in the thousands. So in the coming years, I'm expecting some of the bigger fish to gobble up the little ones. Binance will probably be one of the gobblers, but I'm not sure what other exchanges have enough cash or credit to acquire smaller exchanges.
Anyway, it'll be interesting to see what happens. Hopefully somebody buys Yobit and transforms it into something respectable--or just acquires their customers and ditches the Yobit brand altogether.