Paper money looses value because central banks print money at an alarming rate. The Gold price is going up but what is really happening is that Gold is keeping its purchasing power.
But, when everyone wants Gold then the price will go beyond its purchasing power – even then, Gold has still not accounted for the total amount of physical currency in existence by an order of magnitude.
Gold recently went above $1400USD per ounce (as of Dec 2010), to compare with around $250USD per ounce around the year 2000 – if you do decide to buy, it is very costly to wait – as you never know when it will go up next. Some of us are lucky enough to pick the dips in Gold pricing, but sometimes it will go down a bit after you buy it but soon enough it goes back up again.