The answer is yes because you being wealthy does not mean that your finance can't decline, it very important for everyone to save wether you are reach or poor, that's why the rich is always in search of lucrative investment because of the fear of being poor, the rich look for more money by investing in different things in other to keep their wealth by so doing they are practicing savings in disguise.
But it's the different way of what the actual rich people does, they also do save but not entirely their wealth on savings but in investments. I still want to save money and that's a yes because having cash ready anytime you want to spend it on anything is always the best guarantee that you can have and it will give you a peace of mind. While it's easy to say that the poor people should also save you, you'll never understand their situation if you have never been into their shoes, they barely save and they barely have investments and everything that they're earning is being allocated to their needs for daily survival and food.