The article you gave is a comparison of bitcoin prices over many years. What people really worry about is the price of it in the last few months. From $ 20000, bitcoin plunged to just over $ 6,000, and bitcoin prices are getting worse. If you are really worried. I did not invest bitcoin since the first days it appeared, I just invested in a year ago, I lost a lot. And not just me but so many people like me. So I understand their feelings.