But diversify to keep it.
What this means simply is that you have to be very good at one single thing to make a lot of money. However, if you keep all your money in this one single thing, you might lose it.
Therefore, you have to diversify out of your specialisation to keep your hard-earned money.
Maybe the traditional example would be the business owner. She is very successful in her own field, and everybody hires her. Because of that, she makes a lot of money. However, this money can be gone any minute…