I would really like to meet this person who goes "Hey! Look! People who invested in bitcoin lost money because the exchange service turned out to be fraudulent. Wife, give me my wallet, I'll better transfer some money to a bitcoin exchange quickly to buy those bitcoins"
It's not that easy, I doubt the initial rise if it happens soon will be from new people, you don't read about exchange taking hundreds of millions of users money and sending money to another exchange same day.
If we go up now, it's money from old bitcoiners, noobs might join later if it goes up but them starting it at this moment - I doubt it.
I'm not talking about people who heard about it for the first time. I'm talking about people who heard about it many times.
Bitcoins are not understood easily. Most investors heard about it years before they decided to be part of it.
And now, due to the publicity, some people read that one clarifying post in an unrelated reddit subforum (aww/cmv/funny e.g.) or watched an Antonopoulus video that answered that one misconception they had about btc.
They don't care about Mt.Gox. They care about being part of it for different reasons.
Edit: $ 500 is not that much to risk if the potential is this huge. Europe, the States, China - 12 mio coins is obviously not enough for everybody. It's not even enough for 1 % of the people who wouldn't really care about losing $ 500. So if one out of 1000 wealthy people "gets it" due to the publicity we will see an effect.