Now the question is, is it a natural process or there are some people behind this drop?
Your question is suggestive of a supernatural cause to what goes on in the market (or what actually happened on that said day), that sounds ludicrous to me. To tell you the truth, what happened on that day had nothing to do with any metaphysical. It's as natural as it can get. Trading is a human activity, and of course man's input determines what happens there, not spirits. Whether Dip or Pump, it's a subject of demand and supply that sets price. What happened with the recent dip isn't unrelated to the El Salvador incident. What does anyone expect when there are freebies handed over to people just like that. Of course, a lot of those who got it sold off immediately and that caused more sellers than buyers' kind of situation. When supply is greater than demand, price crashes.