You can do all: own all, buy all miners, buy all bitcoin if you have enough money.

With bitcoin, you can store it in a non custodial wallet and no one, no government can steal your bitcoin. They can not freeze your bitcoin wallet.

Please don't want to get rich with something is free. In any nation, you have to obey local rules and tax responsibility. Many faucets in the past which generously gave away free and big amount of bitcoin but faucet hunters sold all of their free bitcoin.