Btc is cup money is liquid the water and Banks are from the word like a River bank.
So money currency is water and btc IS the cup all assets gold btc and other crypto are the cups where the money the water flowing in.
Those who got cups to collect the water when it's raining those got most of the water so to speak they got most of the money.
If u sell btc early it means you empty your cup ...btc is big cup small coins smaller cups they full faster then biggest cup the bitcoin.
Those who got cups when its raining they collect the most of the money more water more cups needed to collect water.
I am a long time bitcoin investor although I am not very good, but I still have the basics. But honestly, reading your explanation of bitcoin, I really don't know what you're talking about. Hey mate, you don't have to use metaphors and complicate things. You just need to explain in the simplest way it is money, it is an investment that can bring high returns. That's enough, if the listener is interested in that, then let's continue the story by comparing bitcoin to fiat, as the two are completely opposite. They will have a better grasp of everything about bitcoin.