At least when making a post, you should outline your points first even before going ahead to put your reference link. Not everyone has the energy to go over your link reading all that.
From the  article, the four fundamental reason we're;
 1: lack of regulation
 2: magic of supply and demand
 3: a technology still in evolution
 4: world conflict

From the first point, there are other volatile regulated  crypto not only Bitcoin. To make an investment you must understand the risk and agree to it. In the point four, world conflict can cause entire market volatility not only Bitcoin, example was during the COVID-19 pandemic the crypto market was really bad.