Robert Kyosaki, author of "Rich Dad Poor Dad" discusses Gresham's Law where bad money enters the system and good money goes into hiding. In this short video of less than 8 minutes Robert starts off with silver, gold and he mentions Bitcoin, too.
For some understanding Bitcoin can't be done until they understand that the money they have is failing.
The question is also importantly asked, "Why are people poor?"
The answer is because they don't know about good money.