Before revision:  The sources of multifractality are also investigatedand it is confirmed that both temporal correlation and the fat-tailed distribution contribute to the multifractality, and the degree of multifractality for the temporal correlation is stronger than thatfor the fat-tailed distribution .
After revision:  The sources of multifractality are also investigatedand it is confirmed that both temporal correlation and the fat-tailed distribution contribute to it. The influence of "Brexit" on June 23, 2016 to GBP--USD exchange rate and Bitcoin is examined in multifractal properties. We find that, while Brexit influenced the GBP--USD exchange rate, Bitcoin was robust to Brexit .