If I must be honest, I do not think that the bitcoin will be used by everyone in 2022, we cannot also not predict this either but its just something that I do not see happening these days.
The bitcoin has a great future a head of course but I do not think that other currency's will me less more used.
Its not about other currencies, nor it is about governments & all, but still it does not seem to be possible that the whole world would use bitcoin by 2022, we can even does not predict if bitcoin would become more popular in physical world by then because these things are mostly unpredictable.