Billy and Akaisha Kaderli feel like they have seen it all.
The couple retired in 1991 at the age of 38 after saving $500,000.
The former restaurateurs, now both 68, have watched as their money survived a series of booms and busts. After 30 years of retirement, their nest egg currently sits at $1 million.
The Kaderli's initially invested their money in a mix of index funds with a plan on maintaining an inexpensive lifestyle while living off their returns.
Check out this video to learn more about how the couple's retirement spending and lifestyle have changed over the years.
Disclosure: NBCUniversal and Comcast Ventures are investors in Acorns.