Selling Gold?

On TV they are selling gold! At least on my TV they are always trying to sell me gold. The advertising keeps advising me of how week the US dollar is and how safe it would be if I would place my money in their gold, sometime stocks and sometime actual gold. What I don't understand is that if the dollar is so poor and gold is so great why do they want to sell their gold for dollars?

Why do they want to exchange their gold for cash, cash that they say is not secure and is apparently going out of business soon.

John R. Stanczak