Cold wallet mainly refers to a stand-alone version of bitcoin software wallet downloaded and installed on the computer offline.

The operation is mainly as follows:

1. Download the stand-alone version of Bitcoin wallet software, install it on a personal computer, and transfer the comparison coins of other platforms to the computer name; Then disconnect the network.

2. The wallet software generates the corresponding comparison currency address and key file, and the key file is stored in the U disk (bitcoin address and key are stored separately).

3. When a transaction is needed, connect the USB flash drive to other networked computers, sign the key file, and complete the transaction.

Cold wallet mainly refers to wallets that are not often used, which is relative to online wallets.