David is a fisherman. He belonged to Canada's country. He will go to the sea and catch fish. Then he will go to the market and sells fish. He got a lot of dollars through the fish business.
He stores the dollars in the bank. He is known about Bitcoin. He saved 1000 dollars in the bank. He bought 100 bitcoins through those dollars. He bought those 100 bitcoins in 2012.
At that time, the price of a bitcoin was 10 dollars. In December 2017, a bitcoin increased as 19,000 dollars. David was happy to know this. He immediately sold that 100 bitcoins.
By the way, he got 1.9 billion dollars. After that, David is currently living in a luxury life. Other people bought bitcoin like David.