I don't really see how it can go down - Bitcoin seems to have evolved and many of the problems such as hackers taking off with very large chunks of BTC from exchanges and crashing prices seem to be a thing of the past ...
I agree with the $50 prediction. As for the hacking of exchanges, unfortunately as the price of bitcoin increases, so does the incentive to hack exchanges. So I think we are actually more likely to see exchange hacks/thefts/inside jobs in the coming weeks.
If you think about it, bitcoin itself is ridiculously simple to secure, though tedious.
These are good points. I just hope the key players have taken the necessary precautions.