These is the common reasons why the price and money supply in the market is being inflationary and deflationary it's because of our economic problem like oil hike price and the sufficiency products distribution. So it is very important to maintain the peaceful situation in our whole world so the relationships of all country can be peace and happy together.
Unfortunately, such goal is quite hard, even impossible, to achieve, because world biggest countries in the first place are thinking about national interest, not about the global situation. Especially now, when there are the complicated political situation and a lot of conflicts between world "leaders", well-being of "simple" people sometimes can be sacrificed for the greater good of a nation. And of course a lot of money is spending on those conflicts, so it usually deepens financial problems of countries. So we can only hope that someday, we will become smarter and manage our resources more rationally. 
I guess it's more important not the quantity of money but its velocity. The same is relevant for crypto as well: if we may see crazy speed of number of transactions following the instant mode of these operations one may predict that cryptocurrencies may take over the world financial system. What do you think?
I think that new blockchains that we already have allows cryptocurrencies to replace existing financial giants such as Visa and Mastercard, but there is a problem with regulations and maintaining existing government system. At the moment we don't have a working framework which will allow us to build crypto-based economies and of course, there is the question about the richest people and governments, a lot of them don't want to implement cryptocurrencies for a bunch of reasons. But in the near future, I think there is a possibility that we will move forward to the crypto-based economies, especially in developing countries.