Question: Please calculate how many US dollars of profit or loss (rounded to one decimal place) would be obtained by following these steps for three consecutive years starting from 2020: based on the BTC/USD quotes provided by the Binance exchange (using Beijing time as the trading time), buy 1 Bitcoin at the opening price on the first trading day of each year and sell it at the highest price on June 30th of the same year.
Answer: A loss of $16,851.7
A marginal error of 1% is allowed.