Bottom line, the issue is the high volatility of Bitcoin. Am I right?
Bitcoin adoption and the size of the bitcoin market are both still tiny in the grand scheme of things. If bitcoin ever reaches a significant proportion of the global population, then the issue of volatility largely resolves itself. With billions of people using bitcoin daily and trillions of dollars worth of buy and sell orders on the books, then any price fluctuations will be minimal and will not affect its use as a currency, just as no one thinks about how the dollar they spent today is always worth less than the dollar they spent yesterday thanks to inflation.
However, I somehow get your point and It's very obvious that majority of Bitcoin owners are either hodlers or traders and isn't usually used as a currency.
Is it? Why is that obvious? Just because traders are more vocal doesn't necessarily mean that they are in the majority. Traders tend to discuss strategies with each other - people using bitcoin as a currency don't tend to discuss what they've just bought with each other. I use bitcoin as a currency almost daily, but I don't start threads talking about my purchases.