Nice question, some answer are pretty sad though. Particularly the one of binarymax ("PhD in Computer Science"). Money shouldn't be an issue to learn. If I hav

Nice question, some answer are pretty sad though. Particularly the one of binarymax ("PhD in Computer Science"). Money shouldn't be an issue to learn. If I have a lot of time (not only money). I would certainly work in Artificial Intelligence or Artificial Life. I believe this is where I would be the most efficient in discovering something useful for the rest of the Humanity. Sadly, even with a PhD in Machine Learning, I lose most of time resolving trivial issues or making trivial softwares.