Cooperatives. The economy needs to shift away from giant companies with pay ratios of a thousand to one between CEOs and average employees and employees need control over their workplace to move to the next stage of capitalism. Make it easier for collectives to start up businesses that aren't purely focused on profit and instead focused on employees taking ownership of their work.
It may not be the biggest profit possible, but I think that if you enable 22 small worker-owned cooperatives to exist more easily somehow that's a huge karmic return on investment.
Maybe said cooperatives are software companies that work together to do contract work. I think that there are a number of places that try to match up contractors with clients, and places like Gusto work great for employees but I don't think they can handle member distributions (the IRS's term for payments a company makes to an owner versus an employee).
I'm not sure what to do to help the most exactly, but I think this kind of company is going to be increasingly important in the future. Maybe even just like an online forum for people trying to start cooperatives to discuss their common issues.