Will we lose jobs in a bitcoin standard?

I had a discussion yesterday with a co worker. I told him about how we could reduce unnessecary consumation through btc.

His immidiate question was: whats happening to the jobs, that work in production for unnecessary things. will they be lost?

Tbh i never really thought about this because I think we just have to deal with that, if we want a healthier earth and economy.

Does anyboy have a proper answer?