I hold my BTC on poloniex.
How many bitcoins are you holding? Don't withdraw your bitcoins yet, there are much time for you to do alt coin trading.
As others are recommending you what to do, you should just follow the step by steps procedure by withdrawing it first to another trading platform which is localbitcoins.
There's no way for you to let poloniex do the thing for withdrawing it and directly depositing it to your serbian bank account.
He needs to taken out to bank account as a fiat currency so what's in it to go with the altcoin trading.
Best choice is localbitcoins he can find the good trader from Serbia and he can complete the trade in few minutes.
Because all the traders locks with the initial fund by the trading team. Your trade will be also managed by escrow.
He never replied on this thread that he created. He may need to deposit it to his bank account but what I'm saying why not try to wait a little bit longer?
Chances of making his total bitcoin to grow is big and by simply taking up the risk with the high price of bitcoin now is there only if he did followed my suggestion.
But I'm curious if he did ever took his bitcoin to his bank account? Everyone is still waiting for an update, better if he inform us.