From the very first day, since the time when I was a newbie I knew this thing very well that these crypto currencies are very sustainable as I was told the same thing from my colleague from which I have learnt bitcoin but I never believed on him and I personally feel that bitcoin is  very sustainable crypto currency and this is the reason bitcoin is able to made its existence since more than a decade and now the various countries has also started accepting bitcoin transactions and this is very happy to see that Italian restaurant is one of them.