I am 33. I currently have almost enough passive income to live. My income comes from retail stores. I am not real confident that they will last another 50 year

I am 33. I currently have almost enough passive income to live. My income comes from retail stores. I am not real confident that they will last another 50 years. What I am able to invest now is my time. So I spend some time on expanding and diversifying the existing business and some time swinging for the fences with technology. So far I have struck out a couple of times :-/ I don't know how confident I am that these stores would last until retirement age. So my focus is on growth and diversification. Edit: I should say "mostly passive" income. I am still involved.