When Bitcoin was less than 1,000 yuan, some people said it was so expensive. When it was 30,000 yuan, some people said it was too expensive and they would not buy it. Now it is 500,000 yuan and some people say it is too expensive and they will not buy it. If it rises to 1 million yuan this year, will you still think it is expensive? If it rises to 10 million yuan, will you still dare to buy it?