Likewise, I too were once rich when I had my own company, but with that came huge responsibilities, which were life and death scenarios due to the nature of my business, teams climbing radio towers up to 100m tall.
I have also been poor, and had to manage day by day.
Money doesn't buy your happiness mate, now whilst I'm no longer poor, I have a job I enjoy, I'm my own boss, work my own hours, days, married, and very happy, life is no rehearsal mate, so make the most out of your life, you only have the one, as you get older you cherish it more and more.
Don't set your targets too high for the future, little steps, changes, lead to great strides.