thanks for your response guys.
i have another question,i wanna build a rig that contain's 4 asus r9 390x dc2 8gb and 1 rx 480 4gb
actually i feel fear when i think about this, i wanna spend alot of money and i am afraid of altcoins gonna be cheap in future. what shoud i do? is this predict possible?
mining of etc and zcash is profitable in future?
can you give me advise?
extra information: i spend nothing for electricity
Advice is : Don't invest what you cannot afford to loose...
I mined BTC with a GPU years ago and had your same worries.
I had the opportunity to buy an early SHA ASIC but was too worried because of the investment cost and thought I would never ROI and eventually gave up on mining all together until BTC price exploded. (I still had 1BTC on a pool wallet which I forgot about which was a nice bonus)
This story pretty much repeated itself with Scrypt ASIC and I left mining until this August and now I am not leaving again.
If you are not paying the power bill you cannot loose, you will always ROI pretty much regardless of anything.
I think we are still seeing the beginning of crypto and a revolution in how we use money, where it comes from and its properties.
thanks for your advise.that was very useful for me.