In as much as procrastination plays a significant role in our decision making and it's mostly have a negative effect, we should as well be cautious especially when it involved money and risk. What I'm trying to say in short is this, procrastination kills dreams but you shouldn't be in haste to risk it all or with the amount you can not afford to lose simply because you don't want to procrastinate.
The story would have been different if Op invested at that time and the price went down like a quenching fire. He would definitely had hoped he procrastinated and his ass would be saved from that bad investment. What matters here is for one to be decision wise and knowing what thay need at that time. The most important thing is to never regret the decision you take in the long run. Take risk with caution and delay decisions some times if necessary because a delay decision is far better than hasty wrong decision.
Doing something in a hurry is never a good thing, but not acting when you should have acted is where the problem are, and just as the op as said, the regret you feels when you miss an opportunity is much more bigger than the regret you face if you had tried it and fails .
One bad thing about procrastination is that it makes you sees every situation as not the right time to act, and as time passes by you keeps on missing opportunities because of your inaction.
The problem we have is that we want everything to be perfect before we act, but life doesn't works like that, take the risk and start while hoping for the best.