Seems like that quote actually says Bitcoin's state as an experiment, beta or whatever hasn't changed. That contradicts your statement.

The price movement isn't a result of liquidity, or the lack thereof. The problem is that Bitcoin is quite speculative in nature and that any news, good or bad will induce traders to either purchase or sell Bitcoins. This is seen quite evidently by the policies enacted by the banks recently, or spikes and dips when regulations are being announced. Traders speculate and either purchase or sell their Bitcoins as and when they deem fit. This trend can't be broken so long as traders are treating it as a speculative asset. I don't see it as a problem that should be solved, thats a feature of the free market.