The serialization title is "Earn 10,000 yen a day with one hour of BO investment." This is a pun on Mayumime's book "FX Investment Basics: Earn 10,000 yen a day with one hour." The concept of "gradually earning with short time" remains the same. The difference lies in "scalping" vs. "binary options." Recently, cryptocurrencies have been drawing attention, but I would like to shed light again on binary options offered by domestic brokers.