You know what? There are some things in life that are uncertain. Exchange rates are certainly one. (Well you know that anyway). I always say you can't criticise a decision you made based on information you gained at a later stage. You do as you see fit at the time. Doesn't make it a bad move. I also bought some at $1.49 - actually quite a bit. The rate has been much worse than that this year so I feel I did okay.
Unless it is the only time you ever plan to go and are not using your credit card while you are there up is good - even if you have bought! I bought at $1.48 and I am still fine with that.