This is the pi pee principle

Once, when it was free to mine, it was looked down upon by many and even questioned as a pyramid scheme.
Now, its price has risen to 3 dollars, attracting a rush of people.
Behind this phenomenon is the common psychological tendency of people to 'chase highs and sell lows'.
When it was free, there were concerns about risks, but after the price increase, people are driven by profit and blindly follow the trend.