Bitcoin Price Could Hit $15,000 This Year

Christopher Matta, Goldman Sachs

According to my estimates, the recent tx spam on the ETH network cost up to ~$15m USD

Vitalik Buterin

Mining Kills Environment, But Some Cryptocurrencies Resist the Tendency

As the blockchain and cryptocurrency technology develops, the environment suffers more and more. Some people believe that bigger amount of cryptocurrency is needed to compensate for the effect.

BTC mining is sadly remembered, it has brought an industry which consumes a lot of electricity into such countries as China, Iceland, USA and Canada. But wherever mining is flourishing, it encounters resentment of local environmentalists and governments because of increase in level of energy usage. Growth of demand for electricity means that more electrical power will be generated, and this leads to pollution of the environment.
BTC mining took about 15 TW/h in August, 2017. At the moment, the number is about 74 TW/h. Both BTC and BTH are taken into account. Meanwhile, Ethereum mining takes 21 TW/h, this is equal to current energy consumption of Azerbaijan. Let us note that mining of altcoins is not taken into account.

The cryptocurrency that takes care of environment
Bitcoin Green which has been created recently claims that its namesakes are “potential threat to our beautiful planet”. The cryptocurrency uses proof-of-stake, not proof-of-work principle. It means that it’s possible to mine it without special equipment used to mine BTC and BTH. This also allows everyone to start mining cryptocurency.