If RMAH goes up tomorrow gold will drop to $6, but top end gear will probably more than double in price.
Use all your gold right now lol. Even if what you buy right now ends up not being top end gear in a week or two, hopefully you can farm more efficiently with it to find something good to sell for money to upgrade.
If I had saved my gold I would be sitting on like ~300 million. Since purchasing the highest piece of gear in every slot, the effective gold of my entire set is probably 525 mil+. When I originally purchased most of my items they were worth 1-10 million. Now similar, or even worse pieces of gear sell at 5 times the price. I did however have to spend 100 mil on my off hand and weapon
I can't wait for when the gear I have now is mediocre...