Stability will come with size. Forget all the talk of market cap as that really doesn't mean anything in terms of a currency. Only a small proportion of Bitcoins are actually traded and involved in the price discovery process. Forex markets have much more liquidity so it takes much more money to move USDEUR than it does to move BTCUSD. As an example, if the price of BTC was 10x then it would take 10x as much money to move the price the same amount.
There is only one small problem with this.
It's going to take x10 more money to move the price, but it's also going to take x10 more money to keep the price stable .....from a dump with the same amount of
BTC.
If at 1$ you could stop a dump with an average wage, at 1 000 000 if loaded decides to
unload (pun!) it's going to take the whole Oil Fund of Norway to keep the balance.
PS. This is an interesting subject but it is really difficult to discuss with all this signature spam. It is time to make all threads in Bitcoin Discussion self-moderated.
I'm actually admiring LeGaulois for trying to hold the fort this long....
At least we can get rid of some copy/pasters here as the subject is beyond their understanding capabilities
Got two earlier

I can't stop calling bitcoin an investment, because bitcoin is a profitable currency,
D'oh!!!!