I see no demerit in Bitcoin volatility even to traders. Traders needs daily volatility to be able to trade and take profits. Bitcoin investors, investors who are following effective approach of holding for a long period do not bother about price volatility in a short time, they focus on long intervals of price volatility till it sums up to where they think is wise enough to take profits.
We can only see the merit side of volatility, Bitcoin holders prefer when the price in its volatile nature drops drastically creating an avenue for investors to buy in a lower price, the dip price you buy, the bigger profits when the market begins to make bullish moves.
Because you are just looking at the problem from the perspective of an investor with the goal of making big profits. But if you are looking for a payment method, currency, you will find that bitcoin's volatility is a barrier that prevents you from using it. Or if you are a big investor, your priority is safety and stability, not speculation for huge profits. You will also find that volatility is a disadvantage. That is also why, although bitcoin has become popular and many institutions are investing, there are still many large corporations and investors who are hesitant to invest in it.