@envion, thanks for fast replies.

Dragos Roua has some very interesting questions on his blog, could you pls. respond?
1) "shortly, Ethereum will move to Proof of Stake, so mining Ethereum will no longer be possible
2) Bitcoin mining infrastructure is already decades away in places like China or Iceland, where they plugged into solar plants, thermal water plants or river power plants, entire factories, not just pop-up units - that leaves very few profitable currencies that you can mine ..."

Source: https://steemit.com/blockchain/@dragosroua/envion-promises-a-self-expaning-mining-infrastructure-and-obviously-there-s-an-ico-involved