Just try it and report back.

Usually it is of course not possible to make such a profit. So you have to find out, what the problem is.
At btce the problem is, that there are very high deposit fees.
I don't know the problem at cryptsy, but obviously it is a very big problem and everyone should be very careful with EUR trades at cryptsy.

edit:
I asked BitJohn. There is currently no withdraw option for EUR available