Depends on what you mean by “rich”.
Money famously does not buy happiness; but it buys stability and security. Anyone who’s been poor knows how stressful it is, and wealth means you don’t have to deal with those stresses. Wealth means you can fuck up, or be hit by unexpected trouble, and while it may be painful, you know you’ll be okay. Not so if you’re living paycheck to paycheck with no savings and a negative net worth.