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 were;
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.
Point two, the demand of Bitcoin is already high so I agree to 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.
Those are 4 basic reasons about the volatility factor in crypto.
Up until now, crypto market is still in the speculative form of market.
Hence, many users are being attracted into this market for the purpose of possible high profits.