Bitcoin fees on yobit are very high (as well as on many other exchanges). You better convert BTC to another cheap altcoin like DOGE and then withdraw to your own Dogecoin wallet. (I made the DOGE example but you can switch to any altcoin you like....)
And then what? Save yourself a few satoshi's? People (at least the majority) at some point will want to convert their coins back to Bitcoin, which happens on-exchange, and thus you'll end up paying the trading fees, and on top of that the withdrawal fees. People should learn to look everything through, and prioritize what actions are actually worth taking, and which not. Yobit's fees are higher than other exchanges with their 0.0015BTC, but this is something you can figure out before actually depositing any coins. In other words, it's pointless to complain.
Just a small correction. Yobit withdrawal fee is 0.0008 BTC, it was reduced from 0.0015 BTC not so long time ago. So, now Yobit fees aren't higher than on other exchanges. But I agree with everything else that you said.