progress happens with problem solving, human's ability for problem solving is limited by its biology. AI will solve the problem of biological limit for humans if we solve the alignment problem.
Three options for starting a business:
1) Solve a problem better than others (execution risk)
2) Solve a problem no one knew existed (product-market risk)
3) Solve a problem everyone knows about but is hard to solve (technical risk)
Surest money
How do I start a starup, if I have a great Idea which can solve serious problem, but for this I need to make an app but my problem is I don't have any money, is there any cheapest way to start?