Earlier quoted context omitted.
There were bubbles long before government got involved in the market, in fact such bubbles are why the government is involved in the market now. The primary problem with bitcoins as it stands now is that there is no oversight so any sort of price manipulation possible is legal.
Re: Bubbles - Such as? Let me be more specific. If I shall quote wikipedia - "It could also be described as a trade in products or assets with inflated values" Doesn't Bitcoin set to eliminate inflated values? With no central authority controlling the amount of currency available or loaned at certain rates then valuation becomes absolute, no? Re: Manipulation - I'm not sure I understand how the value of the currency…
An example of a bubble before the SEC was created, and in fact lead to its creation. http://en.wikipedia.org/wiki/Wall_Street_Crash_of_1929 The rising share prices encouraged more people to invest; people hoped the share prices would rise further. Speculation thus fueled further rises and created an economic bubble.