Looking back in 2015 when 1 BTC = $10k and just beginning to rise fast, this will look flat.
It won't be $10k in 2015 (if ever).
Reasoning:
1) USD won't collapse in this timescale (just yet).
2) Adoption can't explode to those levels since the network won't scale. Even if "ordinary" tx drive SatoshiDice out of the market, we hit the 1M max block size limit at 10x current tx level.
It may well be "stable" $200 to $300 in 2015, if everything goes extremely well.
Maybe 2015 - 2020.
Anyway, 2 - 5 years is an aeon in technology terms. The block size limitation is the least of our worries -- we need proper Bitcoin DNS to make addresses user friendly; we need an ability for vendors receiving BTC payments to ensure they're not receiving dirty money, etc. etc.
There are lots of barriers to adoption. But I believe we can overcome them. In fact, to many, each of these barriers looks like an opportunity to make money. Just look how the barriers fell to Web adoption, and look at who got rich in the process.
