Bitcoin is a public database of transactions.
Frm To Coins
A -> B 2.34
B -> D 3.00
A -> D 2.11
If the database is fully read (parsed), you can make out the balances on each address.
The account balance can be changed only by the holder of private keys of that account (address).
Once a transaction is added to the database, it is permanent and irreversible.
Max number of coins the database supports is 21 million.
Nobody can hack or change the database, because - CRYPTOGRAPHY.
Database can be downloaded and verified as correct by anybody in the world.
New transactions are sent to miners who add it to the bitcoin database (blockchain) for which are rewarded some fees.
There is no central server or place or building where this database resides - it is DECENTRALIZED database.
A copy of this database exists on computers around the world.
So your coins exist everywhere and nowhere - can't be banned because it’s just information.
That’s it. Adios.