I would always go for real cash. In fact, I don't believe in bitcoin even if I have many friends who are into it. Maybe if it will be established as a stable online currency then I will be using it. But for now, it is still cash for me and nothing else.
FP isn't as good crash as it used to be. Less people are not spending it.
But I like to say that most of the members rather add there "whatever" in the marketplace and offer money from PayPal. FP$ currency isn't affected as they used to be.
BeerMoneyForum.com is the forum where the owners will give you 1 USD for 1000 of their forum currency. However, though, getting a lot of their currency is tough. You have to write review articles. Also, if things aren't done very strictly (in regards to most stuff) they revoke what you gained.
It doesn't really get people to post. instead, it's simply more of the same thing. In other words, if you want real cash, it's going to take some effort.
However, FP$ can sometimes get quality stuff in return - and also be easy to earn.
Any kind of money is good as long as at some point it can be traded for cash. Nonetheless, ironically, though, some people are losing faith in cash - as its value has been dropping since it has no real backing (gold or silver).