Rich people are now thinking about developing their business, going into debt is not because they are not smart, by taking loans they are trying to expand their own business, that way they will expand their business network so that they can easily cover their loans, because the more capital they spend on expand their business, the more profits they can achieve, so thanks to their extensive network they can easily compete with the market, they take out loans after their market is stable and they can also allocate their funds well and in an orderly manner, they must also be able to organize financial management them as best as possible so that they are not harmed by the proceeds of the loan.
Every businessman is a little more intelligent than the common people because in order to do business a lot of thinking research observation and vision needs to be done. Moreover it is never possible to make a profit in business. The issue of debt is a matter of deeper thinking research and foresight because businesses are for profit now if they can't make a profit with debt then there is no need to take debt. They take recourse to debt so that they can profit from it without spending their own capital. So do not know if they are smart but they are intelligent compared to other common people.
I would say maybe the "successful" ones, not all of them. After all there are a lot of people who suck at what they do, and they will bankrupt and those people are not really that smart. Don't get me wrong, you could be a person who has a great successful business and still be a moron, or a person who bankrupt and still a smart person, what your business does doesn't define you if you ask me.
However, more likely than not, if you are smart and have a successful business, you will just keep that going. Wealthy people know how to use debt, because they can, they are allowed to, nobody will give me debt the way they give it to some rich person, if they did, I would have been rich by now as well but we all know they won't do that.