This reminds me of the "dot com boom" meeting online trading.
At time when investment cash was thrown at anyone making a website about their intuitive cat, a good number of people that I knew began to fancy themselves Wall Street wizards.
And a short time later they stopped boasting about all that easy money
It's greed, trying to make a quick buck
driven by envy, keeping up with the Joneses. Most herd behavior is inspired by chatter at the watering holes, talking to neighbors, family, friends, coworkers. Keep your ear to the ground to sense when the next stampede starts and the direction it's headed in. Those running near the front of the herd get the most benefits, assuming they don't fall down and get trampled on. Those in the very back get eaten by lions.