I heard people said that Bitcoin's profit is higher than profit of drug dealer, weapon dealers or profit of real property or any kind of stocks. Is that real ?
It depends to the price of bitcoin because its price is unstable. Meaning, it can go higher or even lower. If you buy a lot of bitcoin with a low price, you can store it in a very long time and you can sell it and gain a lot of profit. The price of bitcoin today is very high so those people who stored their bitcoin, they have the capability to become a millionaire.