Would you want to quit a business or something you are doing and which you are seeing a positive result? Like you are making profits, and I doubt if anyone would do so.
El Salvador is also an investor like us and we should not be surprised if they decide to sell bitcoin for profit because that is the purpose of investment.
It's a never-ending cycle of buys and sells, so, yeah - with time, anyone who holds BTC, eventually, will drop some parts of his bags out, back onto the market - to gain a bit from it and be ready for the future market and other events that are happening on it, and to reinvest more into BTC, of course.