1. almost 3 yrs old with no problems.
2. $1 to me would mean equality with the USD which i think is bunk and doesn't factor its premium.
3. the limited supply.
4. the fluidity of transfer.
5. the overall turn in the general markets oriented towards the next reflationary phase will drive ALL assets up especially Bitcoin.
a. downturn of the USD
b. sovereign bond selloff
c. US Treasury selloff
d. gold/silver stuck
e. stock mkt reflating
6. overall bid side has inflated
Remember the fact that more and more merchant solutions and wallets are coming out, and in the next few months, the Bitcoin network will have more capability in terms of multisig transactions, escrow, etc. The fundamentals are getting better as the currency is on its way to becoming more usable by normal people. We're still early adopters at this stage of the game.