This equation implies two things. First buying one more unit of good x implies buying {\displaystyle {\frac {P_{x}}{P_{y}}}} less units of good y. So, {\displaystyle {\frac {P_{x}}{P_{y}}}} is the relative price of a unit of x as to the number of units given up in y. Second, if the price of x falls for a fixed {\displaystyle Y} , then its relative price falls. The usual hypothesis is that the quantity demanded of x would increase at the lower price, the law of demand. The generalization to more than two goods consists of modelling y as a composite good.
If we invest this financial capital well enough and do not lose it or spend it all along the way, it may even grow at a compound rate that matches or exceeds inflation and taxes. Most of us reinvest inflows from financial capital during the accumulation years. Our investment vehicles tend to be geared for total return and capital gains instead of monthly income generation.
Many people like writing blogs but only a few know that it can fetch you money as well. You can sign up with different companies as a promoter (or an affiliate) to promote their certain product or services on your blogs and websites. The payment method can be either a flat fee or a percentage of the amount of the sale completed, depending on your agreement.
One of the things I'm surprised your article doesn't mention is the tax advantages of this type of investment. The depreciation and rehab costs (purchasing distressed properties) can be huge deductions to ones income taxes, which none of the others have. Then, along with the appreciation of real estate, this passive income investment outperforms the notion of maxing out my 401k as well.
According to the report of The National Association of Software and Services Companies (NASSCOM), India has a presence of around 400 companies in the fintech space, with an investment of about $420 million in 2015. The NASSCOM report also estimated the fintech software and services market to grow 1.7 times by 2020, making it worth $8 billion.[211] The Indian fintech landscape is segmented as follows – 34% in payment processing, followed by 32% in banking and 12% in the trading, public and private markets.[212]

This is another way of ensuring regular income for a period of time. Let us say, you are uncomfortable with the idea of investing in high dividend yield stocks as they generally do not give price appreciation. Also, there is no assurance on dividend yields as dividends may fall if the profits of the company fall. Another way out is to invest the money into a debt fund and pay yourself through an SWP. Let us assume that you did the same SIP and ended up with Rs.1.41 crore at the age of 45. Now you want to pay yourself a regular income for a period of 15 years till your retirement. Here is how it will work.

Retirees are paying a high price as the world stimulates its way out of the GFC (Great Recession).  After a 30-year bull market to the lowest interest rates the world has ever seen, bonds have become highly priced and now don’t generate enough to meet income needs.  Just 5 years ago the average income from $100,000 invested in a 10 year Australian Government Bond (10yrs) was $5,600 p.a.  – now it’s less than half at $2,600 p.a.