Pal bitcoin

1. Yes, it's stored in the hard disk. If it's a physical object, you may not find it when it's thrown into the sea. If it won't be corroded by the sea, it may be found hundreds or thousands of years later. But as a virtual currency on the network, bitcoin's transaction and preservation are all in online accounts. As long as you remember bitcoin's account, user name, password and ID, you will never lose it.

2. A cold wallet is an offline wallet. There is a hardware cold wallet, which is similar to a U disk. Another way is to use a computer or mobile phone that is not connected to the Internet to back up the bitcoin wallet files, install them offline and store them in it! Remember to the key and mnemonic words of your wallet and store them.

3. This is from Gucci... The brand is not clear. Gucci's two G's are connected in reverse. It's not like this

4. Cold wallet is equivalent to your private key and network isolation, now cold wallet can also be put in the card, more secure, I use the cool treasure cold wallet

5. Bitcoin uses a number of technologies, more than one, mainly distributed P2P technology, cryptography technology and so on
it is recommended to search bitcoin white paper for more information.

6. According to the security level, the top is the most secure:
1, offline wallet
2, paper wallet
3, super long keyword brain wallet

7. The time badge is just a prop
and you are wrong. RMB can't buy the badge directly. RMB can buy the badge by replacing it with battle net points