Basically his post can be summarized with explaining that market cap isn't actually the total amount invested, but simply the last price paid times the outstanding supply. He also explains the basics of the bid-ask spread (its not as simple as he describes because there are market makers, spread traders, bots, stop-limit orders on resistence levels...etc) and that it is primarily emotion ("public opinion") that drives price changes, which is supposedly driven by the media. Now "they" are manipulating you again. Those who "who control the media" are trying to trick you.
OP mentions in another post in this thread that he got into crypto recently and is down 50% from his ATH, he's a newbie who feels he "missed out on the ground floor", so it makes sense he would concoct a theory of media collusion to bring the little guy down. Its hard to accept you bought in at a wildly overvalued price point.
The problem I have with blaming this on media manipulation is that most of us encouraged the media's hype of Bitcoin's price increase when it was going up, nobody was against the media encouraging newbies to go investing emotionally based on FOMO. We loved celebrating that the media was "bringing in normies" who would increase the value of our holdings by sending those market orders on Coinbase.
value will definitely move as south korea wanted to invest by putting its 200mln dollars into cryptos