You are assuming that the dollar and the euro will be rock solid currencies. With that assumption, you're conclusions are correct.
Is it very probable that USD and EUR will lose value and people will be looking for alternative money. When people see the financial collapse happening, they will be willing to learn how to use bitcoin.
Gold is pretty much useless, only makes sense as a hedge against fiat currency collapse. Yet the value of all the gold in the world is ~7 trillion USD. Bitcoin is ~1 billion. It's a gamble, sure, but I'd rather bet on bitcoin than on gold.
I'm assuming that the USD and EUR will be relatively stable for the next 10-15 years, yes... But if they did loose their value, why would people go straight to BTC? Most people are completely unaware of Bitcoin, and I feel that precious metals and physical valuables will be the obvious go to investment for most of the population.... That said, I am holding out for your aforementioned scenario!
There's no chance that these paper currencies can hold stability for that amount of time. There's already indicators that Bernanke may back off on stimulus even tho he hasn't expressly stated. There's a portion of his board that want to back off and this will affect the phony stock market that is propping up this facade of stability. I'd venture to say that being stable longer than 5 years is pushing it optimistically. When those in the market get their clocks cleaned, watch out in bitcoinland - the ship is leaving the port.
Lot's of great responses here guys! I have to disagree with this though, there is simply no way the US would let the dollar die... especially so quickly. Without tax money, we would have complete infrastructure collapse and then you can forget about your internet connection to virtual currency. Paper currency is on its way out, but its going to be around for the next twenty years or more, I guarantee you.
I never said it would die or vanish. The amount of printing and future liabilities is eroding the purchasing power and one of the main veneers hiding this is the continuation of pumping money into the stock market. When the bartenders stop serving, the rug will be pulled on the market and the greedy retail investors will be stuck holding the bag. Most people in the know have pulled out and/or have greatly limited their exposure.
What I am saying, like the other poster mentioned, the inflation will be magnified when this hoopla over the stock market goes away and middle aged people as well as retirees will be looking to diversify out of paper. The only way I see things turning around is if Rand Paul is elected President and has a decent amount of allies in Congress to stave off the cheap money policies and cut govt spending with a meat hook; and that means starting with reigning in the American Empire and abolishing whole govt depts. Also, govt regs need to be slashed to open up the private market for better job opportunities. As it stands, younger generations are screwed whether they go to college or not. Now, Obamacare is set to fleece the young in another way.