Earlier quoted context omitted.
Care to elaborate?
If you are looking for how this works: A classic pump-and-dump(PnD) is when a large amount of an instrument (security/commodity/shares/etc.) are bought by a few entities (people/institutions/early investors/etc). Thus creating a scarcity of the instrument which when executed well will be followed by enough hype, as the common people usually see the "meteoric growth" as proof of a good investment and "a large number"…
One twist about bitcoin is that most early adopters are strongly invested ideologically and/or emotionally, reducing some of the potential dumping power. The next year or two should be rather interesting. I could see some large corrections, but each month that passes gives bitcoin more staying power/legitimacy. So far, each downtrend has only resulted in a later movement to much higher levels.
[1] http://blockchain.info/charts/bitcoin-days-destroyed-min-yea...