Maybe the principles of money are known to economics students, but it is easy to check that the general population knows very little about the concept of money. Given how important money is in everyone's life, this lack of knowledge is really symptomatic. So much so that one has to ask oneself if this is done deliberately to keep the masses ignorant of one of the most important aspects in their lives.
3 types of consensus that any cryptocurrency functioning as money has to have:
consensus about rules
consensus about history
consensus about value