A roi of 1 year with a difficulty x15 of what it's right now, and the hope of receiving my hardware soon.
These 2 alone are not enough, what made me really change idea is that I really think the bitcoin economy to grow of several orders of magnitude in the future. I will mine to keep, not mine to sell.
It's a bet.
I have the same feeling. However I also want to use some of the coins I mine, because the economy won't grow if everyone will only hoard coins...
BTC is imo both a "storage" and an "online" concurrency. You can use it either to safely store your money and to pay online.
Spending your BTC in stupid online stuff will not help the btc economy to grow, only an increase of demand of btc would.
What we should do is to create business that accept bitcoins, or find new alternative ways to persuade existing e-commerces to accept bitcoins.
We have to push them, to give them a solid reason.
Buying coffee online will not help us.