1) The buyer can't dispute if he sent the payment as friends or family.
2)yes you are right but i'm new here.
You can easily dispute "friends or family" just like you can do it when its "goods or service" related. Buyers can also issue a CC chargeback with their bank and not only can they (paypal) take funds from your account, they will fine you $20 for the chargeback, and since you really cant fight it (because its crypto related and since its "family and friends" and crypto dont qualify for any protection, youre SoL). Please do your research before staying anything like that.