“As long as you calmly think about it for ten minutes, you will understand that 21 million bitcoins is definitely not enough for everyone to hold one. Besides, there aren't that many bitcoins anymore. " I actually wanted to write this article at the beginning of this year. At that time, it was the darkest time of the bear market in the currency circle. At that time, there were very few people doing science popularization, so I hope I can be a popular science popularizer in the bear marke...