That $120k startup job? Move to a cheaper locale, make half of that in a job that gives you more free time, and you are still making a salary that most workers would kill for. That's easier said than done, but tech workers are some of the most privileged in the world. If you can't make it by on a tech salary, an extra $10k isn't going to do you any good - and that's what basic income promises for each person if the government decides to spend 3 trillion a year. If you don't want to live off of $12k a year, you have to get another job, which you can do right now if you have decent skills.
Sorry to rant, but basic income gets brought up in every thread like it's a solution, but a basic analysis of numbers says it's...going to be hard to do, realistically.