Backing up Bitcoin using only private keys?
Backing up Bitcoin using only private keys? So I'm really new to Bitcoin and cryptocurrencies, and I don't truly understand realtion between Bitcoin private and public key, and address! I understand that for every private key, there is a public key, and that public key can be made and is made from a private key. So for every transaction you would have one private key and corresponding public key. What I can't understand is how to backup Bitcoin wallet using private key! Everyone says you just need to backup your private keys, but do I need to backup every private key, or just the first one, or i just need one private key to access my wallet? Lets say i would like to backup my Bitcoin wallet by writing private keys on a piece of paper and storing that somewhere safe: Do I need to save only first ever created private key to have access to all bitcoins I own, even i added them through multiple transactions? Do I need to save every single private key generated, from every...