Hearing testimonies from different sources, I can only conclude that "You don’t need to be rich to invest, but you need to invest to be rich." Riches aside, investment can increase your financial freedom, but the problem with most people is procrastination, they want this BIG capital to invest, but it is not like that.
From real estate, stocks to crypto, we have seen people buying their assets that were deem worthless, but suddenly became their source of wealth. I remember someone who couldn't afford a land at the city center but wanted to invest. He bought it at a rural area where he could buy over 1 acre. Not long after, the government decided to build a Federal university in that locality. Right now, a plot of land there can buy a plot of land in the city center that he couldn't afford, that is the power of investing.
Not every investment gives your an opportunity to start with a small capital.. things like real estate, stock like you mentioned m, requires a large amount of capital to begins and your profit or let's say your RoI would be like in a couple of years which is true.. but let's come back to crypto and bitcoin to be precise, you can start with very small capital because of how possible the tiny fractions can be bought like the whole bitcoin it self. Such investments doesn't need procrastination, all you need to do is find a good investment plan and get started...