Investors are investing because they believe in sustainable mine because crypto currency will continue to change our thoughts about nature specially the sunlight.

Same it will increase our income because mining will be directly proportional to the amount of money we invest here, so mine more and earn more.

For sure zero cost mining gives life time saving; we can mine 24/7 no more suffering from electricity load shedding, thanks to electrominer.

i advise to you don't go to other altcoin because bitcoin will give you better profit than other altcoins very soon.