All cloud mining services have recently collapsed. I think that the only solution to this problem is related with green crypto mining. It will be able to solve the diminishing returns issue related to more costs and less rewards.

Going green looks like a proper next step for modern technologies; cheap and profitable mining plus no harm for environment...sounds amazing)

Green energy is our only future If we speak about any industry) Sustainability matters.

If all the energy is sourced in a clean way, tokens can benefit from the proof of work model. Many experts agree that proof of work is more decentralized and secure consensus mechanism, calling upon the roots of what cryptocurrency was meant to be (as defined by Satoshi Nakomoto).

Many advantages, I agree) currently services try to use clean energy anyway, it reduces costs and everything but as we can see can't save situation dramatically. We are still waiting for the higher btc rate no matter what.

Many offered positive forecasts of the bitcoin exchange rate for 2018, assuring the future increase in the price of BTC. But I think 2019 should be the year!