So after reading 7 answers to my question I have concluded that 1 BTC =100 million satoshie
[Did you know?] Bitcoin Table of Unitsand there is NO pool of BTCs for sale and all selling or buying takes place on the block chain from a wallet that is on the blockchain.
There is no staking pool or liquidity pool for Bitcoin but if you want to buy or sell bitcoin, you have to do it Peer to Peer directly with your trade partner or do it with a middle man with Escrow service to make sure both buyer and seller of a trade will be safe in P2P marketplaces, or a last option is buying it on a centralized exchange.
Your bitcoin is stored on blockchain, but if you buy it through a centralized exchange, you don't own private key, you don't own your bitcoin. You can see bitcoin amount in your account but it is only a credited number, and you will only own that bitcoin after withdraw it successfully to your non custodial wallet.
Reminder: do not keep your money in online accountsSo could a billionaire buy a million BTCs and try to pump and dump BTC to control the value like they do in the stock market Dark Pool?
There is market manipulations but Bitcoin is not a pump and dump coin.