why wouldn't the US Gov be hording them? They are allowing the citizens to win the war on drugs. Bitcoins are in a bubble for 2 reasons
1. More and more people discovering the deep web every day, thus more demand for coins.
2. a shortage of coins in circulation because they are being bought out and stored - not put back into circulation.
Sure it's a bubble but who knows when it breaks... this happened over the summer. they jumped up to $150 then fell down to $70. (aprox)