ok, but during dot.com a stock opened at 10 and closed at 40 ob every single dayExacly! Many people don't understand volatility.
A simple example: a stock opens the day at 100, and closes it also at 100. So most people think it doesn't make any move.
Technically it is true. But what counts is the activity throughout the day! It usually makes zig-zack movements, up and down, up and down.
And one of the arts of trading is to make profit of these intraday movements...
The only thing people cared about back then was getting filled.
-- but everything has cycles, and records were meant to be broken.