I think you have a serious case of confirmation bias. They are not against monetary systems, though the are against monetary policy that heavily favor the rich, like keeping inflation rates at record lows, which favors debt holders, rather than addressing unemployment via monetary policy.

Matt Taibbi speaks exactly to your comments in this piece on misguided criticism of OWS

This isn't a politics forum, so I don't really want to get into things here, but I'll leave 2 more links here:
* The official Declaration of OWS with a list of grievances (not demands/solutions - these are the problems they want addressed) passed by the NY General Assembly way back in September, and has amazingly received almost no attention even though it addresses the "why are they there?" question directly.
* Mike Konzcal, a fellow at the left-leaning Roosevelt Institute, on possible ways to address student loan debt problem, which has sparked a bunch of healthy debate on remedies for the problem.  This isn't "flailing", it's working through issues. Congress moves slow, and it's a tad unfair to expect OWS to come up with a workable list of solutions to all the world's problems in 45 days. don't you think?   I think it will be a couple of years before things settle down - the Occupy movement is getting bigger, not smaller, and isn't going anywhere.  He and many other economists have been leading teach-ins at Occupy sites, which is the first step towards more people learning and getting more involved.

Finally, if bitcoins are involved in OWS there's a good chance I'll be consulted after my fundraising push for OWS, and I am in touch with the bitcoin holder at the Occupy Wall Street group in NYC. Right now, they have more important things to do than spend virtual money, but I think they'll get to bitcoins at some point in the next few months.  I'm a 1%'er, but I identify with the 99%.