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 maybe if you are a early adopter of Bitcoin and at least a lot of stash back then that you didn't sell, then maybe by this time, you are a millionaire already. But obviously, since we don't have the numbers as Bitcoin address has no names attach to it, we really don't know if they indeed become a self made millionaire or have sold their Bitcoin as early as they can if they doubled their profits already.
So only those who have millions already can invest right now and make more money. For average joe like the rest of us, it could be very difficult to accumulate even .5
BTC to 1
BTC. You can look at this link:
https://bitinfocharts.com/top-100-richest-bitcoin-addresses.html