Even easier if people could just let others take care of _every_ whim. If there was a guaranteed income there wouldn't even be a need for entrepreneurship!
If anything, people would be more likely to start their own businesses if they had a guaranteed income, because it would mitigate the opportunity cost of quitting their day job.
If you'd like to see what people actually would do with money provided by a basic income program, here are the results of a survery conducted by GiveDirectly, a company piloting the idea in Kenya.
It seems that despite your conjecture, there are a number of people investing the income into education, fishing nets, seeds for crops/livestock, fishing nets, beauty salon's, etc.
In my experience, poor people are the world's greatest entrepreneurs. Every day, they must innovate in order to survive. They remain poor because they do not have the opportunities to turn their creativity into sustainable income.
the interesting thing to me is why didn't CA make these moves under Obama if they thought they had such a better plan for healthcare... either way it's a win for DT