How to calculate a cryptocurrency's market cap vs the price

During my absence in the cryptocurrency space, I have spoken with a lot of new people that joined the cryptocurrency space. Everyone wants to get into a cheap coin, but it seems they are not looking in to the price vs the coin supply and what consequences that might have in terms of market cap if it will ever hit a particular price.

Therefore I have dedicated this episode of Cryptocurrency edutainment 101 to dedicate some time to this topic.