I may or may not subscribe to your politics, but you are sorely mistaken if you think bitcoin stops most of the problems with the worlds financial system( unless you consider how Central Banks handle the money supply such a problem). Using BTC instead of USD or GBP changes nothing for Goldman-Sachs or Barclays but the denomination used to value the financial instruments they manipulate ( oh and maybe who's tax laws they have to evade).

Even if we are talking about comercial banking as apposed to investment banking, little changes.Bitcoin is just a protocol. However, as more people interact with it via exchanges that may hold their private keys(think mtgox,bitconica, etc), we start to see things that look a lot like comercial banks: organizations run by people entrusted with the currency you store with them. The owners of these "banks",whether we white guys tanned by trips to the cayman islands and the vineyard or monitor-tanned cipher-punks of some more cuddly ethnicity/gender, can and eventually will abuse that privilege. The will abscond with peoples money, commit fraud, issue bad lonas and do any number of other things with it. Moreover, in the case of bitcoin exchanges,there is very little regulation and no legal recourse in the event of theft or default(since all transactions are final and there is no FDIC for bitcoin).