Why people think BTC will pump on Tuesday because of El Salvador?

Nothing will happen, government probably already bought the BTC needed a long time ago at much cheaper price to get it ready for redistribution on Tuesday. BTC will be sent to citizens that downloaded the app. It's just redistribution of coins they already have. It's not like the government will start sending millions of individual BTC purchase orders to exchanges. There will be no pump at all or maybe a tiny one because of the hype from the Crypto community, but not because of crypto buyers from El Salvador. I bet that majority of people in El Salvador don't even care about Tuesday. Don't FOMO into BTC. Stick to your strategy, continue to DCA and watch the show.

Edit: Ah yes, bring out the downvote guns because you don't like to hear the truth.