Fidelity will soon let employees have bitcoin in their 401k. If your employer uses fidelity, consider sending a private email to the 'benefits' team at your company asking them if they'll enable bitcoin support.

If people in your company complain bitcoin is bad for the environment, respectfully point out that they are free not to invest in bitcoin, and that a respectful work environment can't have employees trying to control other employees' choices and beliefs. Then share a link to the human fight's foundation's video which says opposition to bitcoin comes from a place of enormous financial privilege.