Sadly, that's just how my brain works. If you want to know more all you have to do is google until you find out where money comes from, and you too will become one of the crazy people.
So you're serious...
Currency is neccessary because barter systems greatly restrict market liquidity, and thus inhibit the growth of small economies and the existence of large economies (not to mention that they make equitable trading almost impossible to oversee, so the poor can be endlessly abused by the rich).
Commodity-based currencies won't do because commodities either can be widely produced and thus rapidly decreased in value with improved technology, or they cannot be produced, making the amount of money available fixed at a maximum value for all time (the actual amount necessarily decreases over time due to thermodynamics, which means that there would eventually be "peak economy" similar to but much worse than what is being called "peak oil").
Any economy which hopes to stably grow past its current size must then have a currency which is reproducible, but have a central organization within that economy with a monopoly on the production of that currency and the ability to enforce that monopoly. Further, the fiat value given by the economy to that currency must be great enough that its slow deterioration can be paid for with the currency itself. The way to maximize efficiency of the fiat currency, then, is to minimize its cost of production (real worth) while maximizing it fiat value. Hence worthless pieces of paper.
Institutionalized inflation isn't something to fear, either. High inflation rates, over 4% per year, are bad and can be traced to the central organization with a monopoly on making new money increasing in the actual monetary supply by more than they should be. Smaller rates are normal and result mostly from two phenomena. The first phenomenon is exponentially increasing demand for nominal money. This happens because people expect long-run returns on their efforts while businesses and governments operate in the short term, thus higher nominal wages are always promised in the future while higher real wages can't be afforded, the result of which is the price of everything increasing and the worth of money decreasing. The second phenomenon is that the effective money supply is regularly increased via investment even if the actual money supply isn't increased. Essentially this allows someone to spend money while someone else can also act like they are still holding onto it. The result is that the economy grows much faster than it would otherwise, but the ever-increasing effective pool of money out there drives the demand for actual money down, devaluing it. You can think of this as the price of not investing in the agressively growing economy. You can also think of this as being the cost at large for having a rapidly growing economy because a rapidly growing economy requires a extremely well-functioning credit market, and it is the liquidity of this credit market that allows the economy to behave if there is a nearly unlimited amount of effective money out there even if there is a fixed amount of actual money. Because of both of these phenomena, though, the actual monetary supply must be increased to keep up with inflation or else both the labor and financial markets will grind to a hault, leading to rapid deflation and unemployment, effectively losing a lot of the economic growth that was gained (looks like this is happening anyway, lol).
edit: If you are referring to all the stuff that is wrong with the Federal Reserve et al in the US specifically, then yeah, they're pretty bad, but their inflation rates aren't nearly the worst of it, and in no way is that "the greatest evil of our time".