I'm lucky enough to be from a country with a relatively stable fiat currency, although it is unclear how much longer that will be the case. In order to protect the value I've gained from my work, I do hold some of it in Bitcoin. I also use it to support charitable efforts in less fortunate countries. It is an excellent way to transfer value to exactly who I want to transfer it to without giving massive fees to banks and other companies that facilitate the transfer of funds.
A big thing to remember is that whenever you hold any countries currency, you are basically giving them a blank check to your energy. You are telling them that they can have as much of the value that you have saved that they want. When they print more money, they are taking that value directly from you. It is one thing to pay taxes on income, property, and goods purchased and sold, but on top of that, they have the ability to extract extra value from you just by running their printers. The more you believe that a government represents you and has your best wishes at heart, the more you should be holding their currency.