Earlier quoted context omitted.
Normal currency which is both less centralized and easier to use.
'Normal' currency has severe problems which are important current issues for many and Bitcoin solves: [1], Prevention of access - e.g. Nationwide Bank unserved queues & capped withdrawl in the UK on the days sub-prime hit is often the case in recession or bank runs. [2], Censorship of payee - e.g. the inability to donate to Wikileaks by any means except Bitcoin when 'collatoral damage' incited US Senators to successf…
[1] Bitcoin is very difficult to keep safe, so most people will store it on sites like Coinbase / MtGox. These sites will inevitably lend other people money, which will lead to the same issues, in exchange for interest.
[2/3] Censorship of payee / Censorship of product. The perceived anonymity in bitcoin is largely fictional - you can extract the details of who paid who for what, and you can prevent someone exchanging bitcoin for fiat currency / goods. At the moment authorities simply don't care because the value of the transactions is insignificant in relation to hard currency.
None of these 'problems' (and society in general doesn't care about these issues) are to do with the currency. The first one is endemic to the concept of a bank which can lend more money than it has, no matter what currency it deals in. The second two are social / regulatory problems which won't be fixed by some new crypto-anarchist dream.