Of course, money causes stress. If you have no money, you have no home, car, etc. Money is one of the leading causes in divorce and break ups. Money gets your kids Christmas presents. I currently stress about having enough to pay bills and provide for my family to make sure there is food on the table and our heater works.
Yes, money does cause stress. Money can cause stress in two ways. First, not having money can make people stressed due to their inability to afford their daily needs. On the other hand, having money can cause stress because it can make a person greedy and ruin their relationships. Either way money can indeed cause stress.
Of course it's hard to make money, but it's a fair system. It's a fair system because it works well. It works well judging by how our world is now.
Now. There's a downside to the difficulties of making money, but it's survival of the fittest. But many people are capable of working hard and making money if they are not lazy. Money CAN make you greedy. Everything is supposed to be in moderation.
What I can say is that money can buy medicine, and a great lifestyle. You can have a happy family if used right. The important thing is to be educated about it. You have to take precautions to make sure people don't take your money. You have to also be on top of things and be more responsible. But using it wisely, money buys you time and a lot of fun.