Hey kevinwong,
i appreciate your thoughts - sure, you can always debate over the worth of money - no matter which one - in times of war and deep crisis, everything, not needed for pure survival is worthless.
In 2nd WW people traded their jewelry, paintings and even houses for some food or fuel - after the war, these things got their pre-war-value back, but they only work out of crisis.
During crisis, best be able to be function without money :) learn everything and take up some survival skills.