If you are trading bitcoins, one good approach is that you normally have 100% BTC (from your invested fiat) and if something happens like big up or down then you should have a clear plan what to do, short-term future becomes a lot more easy to predict when these major spikes appear first.
Forget about how much USD you have short-term, focus only to get more BTC, because longest trend is UP UP UP.
I have noticed that my biggest loses (BTC) come when I'm holding USD and waiting too long. Don't wait that the price falls.
Make a plan and stick to it when something happens.
Seriously now; Bitcoin economy should get serious before it gets better; but this requires guts and idealists behind bold decisions. I don't personally find a bad thing guys like the Winklevoss bros and Roger Ver having a great deal of coins. As Risto has mentioned in the article (and the respective thread here) there's a great chance the current million dollar fiat situation will just re-establish itself on bitcoins in the future. Face it; this is just how things are. You could have been in their position. You may as well are and you don't really know it. How many people do you think they will own a single coin in the next 5 years? Will you be among them?