So could you make it rich short selling an artificially pumped up penny stock?
Yeah, but I wouldn't recommend it unless you know what your doing and can afford it... and if you can even short penny's (dont know for sure what the rules are on which you can/cant short).
I wouldn't daytrade with alot of $$ unless you are very tempered and emotionally detached, and have the time throughout the day to keep up with things (as in, you pretty much daytrade for a living).
And its easier to commit securities fraud than you think. I've seen alot of crazy stuff go on in the message boards.. everything from people making false subpoenas to internet stock radio 'accidently' publishing a fake press release.