Crypto can be extremely political if those who mine get to decide what goes on the blockchain. Let's say Dalai Lama decided to follow MicroStrategy with a 400M

Crypto can be extremely political if those who mine get to decide what goes on the blockchain. Let's say Dalai Lama decided to follow MicroStrategy with a 400M purchase. His BTC could be near unusable if China were to control some amount over 50% of mining capability. How could that happen? The blocks you mine you simply not process any of "undesirable transactions". If any of the lesser miners find a block and try to add a transaction to the ledger you perform a double spend attack.