Understanding good return on investment is very essential.
Basing your financial foundation on bad assumptions means you will either do something irresponsible by overreaching in risky assets or arrive at your retirement with far less money than you anticipated. If you were an equity investor over this period, you sometimes suffered heart-pounding losses in quoted market valuation, many of which lasted for years.
You can read about it in details here: https://www.thebalance.com/good-rate-roi-357326
Besides if you do have any questions give me a call: https://clarity.fm/joy-brotonath