I strongly agree on your opinion that, mankind an product the energy not only from oil. Because there's also wind energy, sun energy. And soon people will switch to this types of energy product. And adding also my opinion that, I think in the future blockchain will developed energy efficient mining solution to this current problem, but for today the solution for this is by using green energy like solar, wind and water energy to mine bitcoin because this energy is too much efficient in bitcoin mining without destroying the world. In addition, Bitcoin is not destroying the country but is saving the world from destroying. And I think Bitcoin always helps the country. On the otherhand, I think Bitcoin can never destroy the world, this is a misconception. Bitcoin will once again make economic progress around the world.