The Real kicker here is the monetary situations in crypto-currency, is akin to the United States in revolutionary war period up until the Constitution. And pre WWII economies in Eastern European Currencies without a world bank. Proliferation without backing,

Prior to the Constitution Congress giving domain of Currency to the Federal Government and taking it away from the States, every state had its own currency and there was widespread inflation and deflation and predatory practices. (sound familiar??) The term don't take any wooden nickles came out of that period from the exact situation of actually some states using wooden coins....

While crypto-currencies sound good as a fiat,,, they are anything but that... you are essentially looking at a situation were someone makes a grocery list over night and goes down to the store to buy a loaf of bread and now their bread which yesterday cost $2 today cost $12 or now is worth .20 hurting the grocer, who can't be constantly repricing every item in inventory....

Even worse you could have the situation Confederate Dollars or Laos Coin, where the government does not exist and the normal person does not have life savings anymore!

That's why the USA was on the gold standard till the 1970s and has a managed monetary fund....

Don't get me wrong I'm not saying crypto-currencies don't have there place but, there will always need to be a few real world fiats gold, silver, platinum and a few Currencies based the strength of the biggest economies USD, Japan, China, (and if it does lose any other members the Euro)