2: In bitcoin, you have full control of your financial assets. You have ownership to your private keys which is not always available in our normal banking.
Exactly by using bitcoin you can see or monitor your own transactions you have full hold on your coins if you are using decentralized exchange you can send or receive bitcoin directly without any third party
3: As freelancer who works online, you can use bitcoin to facilitate some of your transactions.
If you are someone who values their privacy even working it would be really great to use bitcoin or crypto as a way for your clients to pay you