If you have two Golds as your only source of money, how did you buy three Provinces? More importantly, why would you build that deck?
1) Possession. You would build that deck because there is support for it, but now your opponent has greened heavily in response to your Possession and it's not likely that you can buy another Province with his deck anymore.
2) Maybe you remodeled your other Golds to get those Provinces. You would build that deck because having five Golds and a Remodel isn't really a bad deck.
3) Your other sources of money got trashed by a trashing attack. You wouldn't want to build that deck, but in this case, you don't have a choice.
4) Your opponent Swindled your Peddlers into Provinces. You would build that deck because there is nonterminal +buy and because you know that Peddler is good against Swindler.
5) You used Spoils to buy those Provinces, but now your opponent has the entire Spoils pile in his deck. You would build that deck because Marauder and Bandit Camp are pretty good cards.
6) You were forced to Masquerade away your other sources of money. Again, you wouldn't want to build that deck, but you can't choose otherwise.
7) Your opponent was forced to Masquerade away his Provinces. You would build this deck, because Masquerade is so good!!!