Ask HN: What are some problems to solve?

I think I have fairly good skills and knowledge in the areas of programming (Java, Python, SQL), Mathematics, Blockchain/DLT, Cryptography, Data Analytics, Quantum Computing - in that order.

Currently I'm finding some free time on my hands. I did a research task in Quantum computing for the past 4 weeks, wrote my own minimal simulator and got bored.

What else can I do? Thinking to do more in Data Science, but don't know what to take on, to have a significant purpose and impact. May be post-quantum cryptography is a good area?

Any suggestions?