Bitcoin really did go up high so fast in value. Looking back it was just priced so low that anyone could just buy it for fun or just to experience how cryptocurrency works. Because of the sudden increase over the years as people have learned that it was profitable many around 2017 had participated in investing in bitcoin. Now because there was no actual usage just purely holding of bitcoin the result was the balance went off. Actual usage is low compared to holders and this created more volatility. Because the more people who are just waiting for value to rise the more people will be selling. The more the price decreases the more people got panicked and sell their coins. So the price keeps moving up and moving low. After a very high rise of bitcoin price a very low downfall is always expected not unless the bitcoin will be used more often for a purpose.