There is not deflation happening right now. There is massive and sustained inflation, which you can see all around you in terms of high quality food prices (meat, cheese, seafood), housing, all forms of education not subsidized by the government, medicine, cars, and on and on.
The reserve currency status of the US dollar is a side effect of the US' relatively brief global hegemony which is rapidly collapsing, plus the reduced global importance of oil which has been priced almost exclusively in USD. There will be many threats to USD from other countries (China, the EU) and experimental technologies (Bitcoin, Ethereum).
Several generations of economists have bought full-on to a failed economic system. We have been seeing many problems with it over 40 years since we removed any pretense of the gold standard,[0] but we have seen it over and over and over with various crises. Anyone who thinks our current monetary system is the best humanity can do is not thinking critically.
Or you can just put your money onto a bank account that nets interest. The fact that interest rates are down is actually the sort of result of deflation. The reserve currency status puts immense deflationary pressure onto the USD. The government is forced to go into debt to cancel this pressure. If it did not do so employment would plummet.