I have spend weeks to build my actual mining power.
At the end of building it, i was earning 10-12k$ in eth/zil.
After few months, it`s still same amount of dollars.
I just stoped buying GPU`s - prize was and is still to high.

I just wont to say, that mining and selling instantly or changing into other coin/fiat, for me is foolish.
I`m seting an order with +20% handicap. Takes time but always pays off.