Today most people earn billions of dollars through investments. Some of the richest people in the world also own millions of dollars in investments. Anyone investing in real estate, or an industry, because they know that a million dollar income is possible with just one investment. Real estate investing can make people rich over time. In the same way, a person can become a financial magnate over time in Bitcoin investment. Just be patient and keep investing.
Well, it depends on the level of investment and how much one can afford to invest. We can't compare investments that billionaires make with Bitcoin investments because when you are investing in real estate, you need a lot of money to start because you can't buy a property with $50 or $100 or something, but when you are making an investment in Bitcoin, all you need to start is $10 because you can buy $10 worth of Bitcoin without a problem.
Billionaires won't need to invest money in Bitcoin for profits because they already have enough active companies and investments, even if they think about it, they wouldn't need to wait a long time because they can invest large amounts and sell as soon as they are getting some profit and repeat the process.