As a value store? Clearly because of exposure.

As a vehicle for trade? Not there yet, we need more adoption, aided by exposure.

Funnily enough, my grandparents were telling me about how they were suspicious of debit/credit cards when they first started. Now of course, they feel very comfortable using them. Not directly comparable with bitcoin, but interesting in the sense that it was a significant paradigm shift in the way money was spent - initially met with skepticism, but eventually it caught on.

Isn't the exposure making people less likely to trade? No-one wants to spend bitcoins because they're afraid they'll grow in value and they will have wasted money.

But people are trading all the time. The exchanges prove that: as many bitcoins bought as sold! :)

Will the buyers be willing to use those bitcoins to buy other things than fiat currencies? Once more products are sold in btc, why not?