In movie Wolf of Wall Street Jordan Belford calls random people and persuade them to buy stock. Was it common in 80s and 90s to buy stock from someone you don't know?
I know before internet people called their brocker to buy and sell stock, and brockers often advice their clients on what to invest. But Belford calls random number and sell worthless penny stock. How could you take phone call from brocker you never traded before and follow their advice?