Because YoBit has absolutely zero hints of legitimate trading.  All they care about is pulling in fees, and to do that they'll list the absolute worst coins in existence even if they:

-No longer exist
-Are meaningless pump and dump coins which have no reason to exist.

They will also have their wallets in "maintenance" for months on several coins while they could basically do whatever the hell they want with all those coins.

Transfer to Bitcoin and then try and withdraw to Bittrex, that's what I say.