Hello miners
Good morning.
![Wink](https://bitcointalk.org/Smileys/default/wink.gif)
I am thinking to build ethereum, zcash & etc mining rig with 5 xfx rx 470 rs 4gb which may make profit of $200 with current price of ethereum ($297).
Or which coin is good for mining this days which will benefit me further.
But i have some doubts which you people can clear
![Roll Eyes](https://bitcointalk.org/Smileys/default/rolleyes.gif)
*And this maybe be a very noob question but I still didn't understand how this cryptocurrency works and what are it's applications?
![Huh](https://bitcointalk.org/Smileys/default/huh.gif)
*For example if I have 3ETH after 6months but where can i use those 3ETH in real life?
Hoping for good answers
![Grin](https://bitcointalk.org/Smileys/default/grin.gif)