Don't kick yourself for spending when you did, because as I'm sure you're aware, it's just as likely that you could be now saying "Thank goodness I used those Bitcoins when they still worth something".
I bought a bunch at ~$1, then they jumped to $10 and it started to be fun, because I had a bunch more value to play with, then they jumped to $100, I thought screw this. This is not why I bought them and if they keep up this volatility, then they're not going to be useful for what I want to use them for (ie. buying/selling online).
I don't regret selling them when I did, and I don't think you should either.
How is that in any way useful or going to improve future decisions? Bet on black, because you know, that's where the trend line is going?
Case in point: Do you short Bitcoin now or not? Who freaking knows...
As I said I bought VPN with it when this stuff was in baby stages. Now at 10k USD valuation the real world usage hasn't grown all that much from there...certainly nothing like the price growth. So I'm staying really fkin far away from this.
People called it right & made a killing of it - more power to them. Realistically this can't going though without some monster sized improvement in the underlying non-speculative transaction volume.
Real world utility and pricing have to converge at some point. Right now they seem to be growing apart exponentially and all I can think of is RIP whoever is on the wrong side of that when it returns to reality.
Hindsight 20/20 I guess