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Politics, Economy, and Society Cryptocurrencies crashed with abnormally high prices. What happened? We look at the causes of price fluctuations and see what will happen in the future of cryptocurrencies. At a glance, we can see trends in the future, such as the use of micropayments and blockchain technology, as well as electronic money in Japan, which has been left behind by the trend toward cashless transactions, and China, which is making rapid progress.