If there is no constant value, offline transactions are very headaches for people
At the beginning, bitcoin was also worthless. The first transaction to be circulated in the market was on May 22, 2010. A program developer bought two pizzas with 10,000 bitcoins. According to the highest price this year, this  Two pizzas are worth $40 million, and the day is dubbed "Pizza Day" by Bitcoin enthusiasts.  When bitcoin was at a low ebb, someone in Zhongguancun bought a cup of coffee with one bitcoin.