Where our money actually goes in buying BTC?
ans. When we buy something we give money to a seller of that thing. Similary,here, exchanges or some person takes fiat in exchange of bitcoins.
Why we add parent xprv to left 256 bit hash value ?
ans. Because someone with parent xpub can also generate same left 256 bit and get the child private key. So, adding xprv of parent will make it impossible to get child private key.
Why chain code is always generated?
Ans. To get enough entropy for next formation of key.
Where our money actually goes in buying BTC? ans. When we buy something we give money to a seller of that thing. Similary,here, exchanges or some person takes fiat in exchange of bitcoins.
Why we add parent xprv to left 256 bit hash value ? ans. Because someone with parent xpub can also generate same left 256 bit and get the child private key. So, adding xprv of parent will make it impossible to get child private key.
Why chain code is always generated? Ans. To get enough entropy for next formation of key.