As a means of trade, yes, they are powerful because they are widely trusted and preferred.
However once you have them, you get rid of them. Good assets don't lose value over time. https://www.statista.com/statistics/1032048/value-us-dollar-...
However once you have them, you get rid of them. Good assets don't lose value over time. https://www.statista.com/statistics/1032048/value-us-dollar-...
https://en.m.wikipedia.org/wiki/Civil_forfeiture_in_the_Unit...
https://en.m.wikipedia.org/wiki/Executive_Order_6102
https://en.m.wikipedia.org/wiki/Greek_austerity_packages
A 51% attack doesn’t let the bad actor steal someone else’s coins. It lets them reverse and double spend their own spending. They can’t directly steal coins. The flexibility of open source software gives opportunities to mitigate such an event, should it happen.