I believe employees in all countries would have this type of investment plan in a way there would be companies rendering services in which the employee would be saving 10% or more of his/her salary into retirement account. This type of investment would be tax free and I believe this is how it supposed to work in all countries. Normally, people save fiats into retirement account, and as we know that fiats are fully vulnerable to governmental manipulations which can result to fiats value depreciation/devaluation.
Although, we should still remember that bitcoin is meant to be a privacy coin, not your private key not your bitcoin.
So, there is an upside to this plan - probably those savings could worth a lot more by the time a person will use it.
The downside, as you could guess, is related to the upside - saving could loss in value massively.
So I guess companies could add this as an option if a person believes in crypto.