Something happens, we cannot lie to him

When a country bans Bitcoin... That country essentially castrates itself from it, leaving them behind while everyone else adopt it. Because Bitcoin doesn't give two fucks; it's software its an idea that lives on the mind of everyone who encounters it.

Even if you "ban" it will still popup, the only thing you can ban are bridges, Fiat on and offramps. People will still buy and sell peer-to-peer.