Thanks for the question. Bold of you to assume I was earning 15L in my 20s. 😁
My 20s, which were a while back, were mostly about focussing on savings and making bad investment decisions.
I didn't hit 7-figures until my late 20s. I went over the mark only because of my stock options going 5x over a two-year period. Good times.
Before that, savings did manage to help me buy a home and my car before I turned 30. The stocks helped me be debt-free.
Most of my investments in my 20s were life insurance policies. Needless to say they didn't pay -- even the ones I held to maturity.
I didn't start an RD till I was 25. They helped quite a bit. I moved to mutual funds in my early 30s, and that was the best investment decision I've made.
I'm currently working towards FIRE and I've realised that 300x my monthly income need is enough. I'm halfway there net of my real estate holdings.
If another bull run happens, I may get there under five years.