Bitcoin is very sustainable crypto currency and this is not hypothetical as being practical , I am saying this on real basis that bitcoin is a sustainable crypto currency as it has made its existence since more than a decade and in this decade bitcoin has made tremendous progress and has gained millions of investors all around the world , so I think morons are the people who thing that bitcoin is a scam or a Ponzi scheme or a bubble that would burst soon and the market of bitcoin will fall ever.