From the America history we can know that America was a Deflation economic system in few years. At that time USD was maintain and the prices was keeping a low average. This why we need a 'something standard' monetary system but not a credit credentials paper.
You can imaging that if some 'third world countries' become a 'Bitcoin standard' monetray system , and show the Bitcoin savings address, what will happen?
Bitcoin will not be issues over the maximum supply ,and nobody can make a 'fake bitcoin'. These country need to save x bitcoin to issue their monet, they will have a healty economics system, the other countries will happy to keep their money and want to trade will them.
People won't be afraid of inflation , and the prices will not go high in a long cycle times.
It is very very hard to happen for big economies like China, Russia or US! Because bitcoin is simply not capable of scaling up to accommodate the growing need of trillions of transactions! However, it may be possible for small economies like Malta, Marshall Island, Tuvalu, Kiribati etc. They have small population and even smaller economy. So bitcoin will be able to standardize their economies and work as a reserve currency for them!
But countries with billion and near billion population, can't even think of cryptos as standard! It will be disaster for them!