The problem isn't the price going up, it is the wild back and forth swings as leveraged traders enter and exit trades that is hampering Bitcoin being used as an actual currency. When the Russian rubble started to drop in the last few weeks people were scrambling to buy any hard asset they could get their hands on to preserve purchasing power. So the same concept applies to Bitcoin. Stability is necessary for bitcoin to flourish as a means of exchange, otherwise all we have is a fancy new casino.