Here were the numbers that I used to decide to buy up until the spring of 2013 and start selling last fall.

I sold more than half of my holdings last fall/winter, but I'm still holding a bunch while I wait for the Winklevoss twins to get their ETF approved and for enough exchanges to be set up around the world to enable the remittance use case to really take off (once neither the sender nor the receiver needs to hold BTC).

Once those things either happen or seem like they're not going to happen, I plan to sell a large portion of what I have left and then keep a bit in reserve just in case one of the truly crazy scenarios referenced in that reddit comment comes to pass.