Saving alone may not make one a millionaire in a short time. Investing in high-return assets, starting a profitable business, or acquiring valuable skills can potentially lead to wealth accumulation in five years. However, there is no guarantee.
As long as you start early, you can rip the fruits of your effort by the time you want to leave the workforce or try some new venture. You can accomplish a lot in 5 years, but it's still a really short period of time in the long run.