If you compare with fiat currency, cryptocurrency energy cost is still far from them.
for example if you use paper money, you need to cut trees to make paper, electricity for production machines, waste products, etc
for example if you use paper money, you need to cut trees to make paper, electricity for production machines, waste products, etc
But after you make them you can sit and relax for about 10 years.
And about transportation, an armored truck doing 100km would roughly consume as much as 5-6 S9 running a whole day.
And, paper bills like the euros are not made from wood pulp, they are made from cotton.
Would you consider the use of the most powerful GPUs in the world for gaming, more wasteful than running those GPUs to sustain a global currency? Those GPUs are currently being used for fun, where the hashing power could have been used more productively to sustain a few thousand global Crypto currencies. 
Most of the ASICs in development today are geared to energy efficiency and the mining farms are powered by renewable energy sources, like hydro/Wind/Solar energy.
Most of the ASICs in development today are geared to energy efficiency and the mining farms are powered by renewable energy sources, like hydro/Wind/Solar energy.
First, you know too well that energy efficiency will not reduce electricity consumption.
If the new miner east just 600 instead of 1200 KW the hashrate will just double as it's cheaper to mine and in the end to electricity burned will be the same.
As for the GPU, gaming part...it's all about options.
Can you experience the same gaming with burning that power? Nope.
Can you make donuts in the parking lot without burning tires and gas? Nope.
But can we have some solution to protect the chain with burning that much electricity? Maybe
And I say maybe because I'm no fan of PoS, but there might be another way to secure the chain.