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.
1.Try to improve your English.
2.Your comparison is wrong. Comparing BTC to a cup means that your earning or investment potential is limited(or that the amount of BTC, which you can store in a BTC wallet is limited).
I would compare Bitcoin mining hardware to cups full or water, because their earning potential is limited to their capacity(and several other factors like electricity prices, hashrate, current BTC price, other costs, etc.).
Fiat money is a like an ocean of low quality salty water, while Bitcoin is like a stream of fresh high quality mineral water, which you can drink.
This is a way better explanation of what Bitcoin is in my opinion.