Pick a problem that you think is 1) a real problem people are willing to spend money on to solve, 2) you believe you can create a better solution for than what's out there today, and 3) make sure it's something where you can actually reach your target customer.
100% agree with Florian. Focus on solving a need.
Pick a problem that you think is 1) a real problem people are willing to spend money on to solve, 2) you believe you can create a better solution for than what's out there today, and 3) make sure it's something where you can actually reach your target customer.