Because of economic downturn in the world, most people have become jack of all trades and master of non. learning skills and not getting a mastery of them because they are testing waters on which of them will eventually pay the bills. I have a friend who during her spare time learnt soap making, baking, sewing yet she's not making money off these skills.
It is better one learn one skill and master it very well than learning different skill and not even mastering anyone, it is only when you master a skill that you can make money from it, some people are too in a hurry to make money and they decide to learn any skill they notice is paying and from there they end up learning a lot of skills and not even making money from them and they are not even a master to any of the skill they learnt.
I know of someone who has learnt a lot of skills too and he didn't master any of the skills and till date his not using anyone to make money, people should stop being in a hurry to make money calm down and learn a skill and it should be a skill you love with passion after learning it go into it focus your attention into it when you are now a master in that skill you will start making huge amount of money.
I'm not saying learning different skill is not good but master one before going into another.