The only problem of money is inflation. The ability of one single entity to print money at will, stealing from everybody else without them noticing is one of the greatest con jobs in the history of mankind (and we all know who has the master printer in the world)

Money is a beautiful instrument for trading and free markets, the only way for two entities to peacefully exchange goods. Inflate that money supply and you are silently stealing from the pockets of those who trust that instrument