Merry Christmas and Happy New Year! I'd like to wish each of us to learn how to find problems that:

Guys, Merry Christmas and Happy New Year! I'd like to wish each of us to learn how to find problems that:

1. Haven't been solved by anyone yet.

2. People are truly willing to pay to have solved.

3. Have a really large market.

4. Solving them is profitable for you.

5. You enjoy solving.

And, as per the old tradition, a few new problems have been published.