Thanks Yogee. You're right, I'm not native English speaker. Will definitely get somebody to rewrite it in a more natural way (paying in BTC

Thanks for the feedback RapTarX, webricks. I used password instead of private key so it's more understandable for general population who have no idea about Bitcoin and cryptography.
I'll definitely rethink on whether to rename it, but I'm trying to avoid cryptographic terms like Public/private key. The majority of population don't know about it, but at the same time it differs with other explanations. So, what do you think? Let's see if there is other opinions on this. Otherwise I'll test it with users.