You are right that there are speculators in the Bitcoin market who only look for large gains and making the most profit. But I wouldn't say that this is the majority of investors. The most people I know who hold bitcoins do so as a long term investment, they wouldn't sell if there was another 20% price movement. As for the volatility I think it's kind of normal as the number of traders and investors increase so does the volatility if there are bad news. So far the changes ar not in the 100-10000% range, I think this was in the past and bitcoin is more stable than that now. Are you not happy of the rally last year or would you have preferred BTC being constant at 10,000 USD without any volality?