A real way to project the price of bitcoin

I decided to do some math to try and project a fair price for bitcoin. I looked and saw the dollars worth of bitcoin transactions per day, and there is 750 million dollars of bitcoin being transacted per day approximately. The average American is 35 years old and retires around 65 years old. The average American saves about 6 percent of their annual income for retirement. Thus, assuming 6 percent of the 750 million dollars are being held for 30 years every year. Which is 45 million dollars a day (750*.06=45). If we multiply 45 million dollars by 365 we get 16.42 billion dollars per year being saved for 30 years (65-35). If we multiply 16.42 billion by 30 years we get a projected market capitalization of 492.6 billion dollars. If we then divide that number by 21 million bitcoins we get 23457 dollars as the fair price of bitcoin today.