First, I live in South America, specifically Chile. Bitcoins are an extremely uselful way to buy stuff from the US, completely bypassing credit cards or paypal and their regulations and fees. The problem is, I don't use bitcoins as a store of value.
It goes from CLP->BTC->USD debit card, or CLP->BTC, which is used as quickly as posible, so I can ignore the exchange rate.
Anyway I guess exchange rates don't really matter for people outside the US, bitcoin for me is just a very efficient and cheap money transfer service.