Bitcoin is volatile because there is a limited supply only and it is just 21 million bitcoins. It is also difficult to mine bitcoins because as far as I know it is divided into two after 4 consecutive years. I think that is the reason behind its volatility. Its price goes up when there is a great demand but the price becomes lower if the demand will goes down. It is a matter of scarce resources.
You are right. Bitcoin had the maximum capacity of approximately 21 million. The result is the movement for it. Bitcoin is volatile because of its limited supply. Bitcoin is limited, so its price is much higher. When the price increases, it makes all things look good. But sometimes its value decreases. Bitcoin is our property. At present, Bitcoin becomes expensive at the price of gold. Bitcoin is not a new volatile. Previously used coins that were copper or silver were more volatile. It was common in other countries including America. Bitcoin is progressing at its normal pace and its transactions make investors unstable. Someone recognizes this as an online product. Bitcoin's mine is limited, so Bitcoin has a huge demand that makes Bitcoin volatile.