~snip~
If you are new in the world of Cryptocurrency you cannot consider the current price cheap and if you just found out what's it's price 6 or seven years ago people find the price of Bitcoin high, so they look for other coins or altcoins that are cheap and has a huge potential to be the next Bitcoin, investors are still buying Bitcoin but they are more on altcoins right now.
The OP is very optimistic on what currently Bitcoin has that's supposed to pump the price. He have El Salvador as the prime example and he's expecting the price to plummet after the announcement, but there's actually no market reaction, thus he ends up posting this one out of frustration.
Literally, no one is considering the Btc price as "cheap". But as to the OP's POV the current price is too low for such big news that came out yet no market reaction has happened.