See, I had a different thought here. If anything, mining new bitcoins reduces the value of current ones. Correct me if I'm wrong, but what's keeping the bubble from bursting is more dollars coming in - big miners aren't doing that, they don't buy their BTC.

Unlike a clueless average Joe at home, they're running huge businesses, as this article suggests, so they're probably smarter. Does anyone know what the math here is? I'm assuming a) they aren't cashing out too much/too regularly because they're huge and this would drop the price too much and b) they aren't stupid to make huge investments like this, just hoping all would be well.

Where am I wrong? Is the number of fresh "investors" still big enough for all of them to have a steady cashflow? Do they believe they can get out before everyone else? Are they just like all other believers, but with deeper pockets?