Digital currency wallet and digital currency system

A digital currency wallet, comprising

• a storage unit comprising digital currency and a digital currency wallet mode;
• and
• a transaction unit is configured to check the stored digital currency wallet mode before using the digital currency in a digital currency exchange;
• the digital currency wallet supporting a first digital currency wallet mode, the first digital currency wallet mode being a normal digital currency wallet mode, and a second digital currency wallet mode;
• the transaction unit—when using the digital currency in a digital currency exchange in the normal digital currency wallet mode—is configured to create and/or receive exchange data and to store the exchange data in the storage unit;
• wherein
• the second digital currency wallet mode is a crisis digital currency wallet mode;
• the digital currency wallet is configured to switch from the normal digital currency wallet mode to the crisis digital currency wallet mode;
• and
• the transaction unit—when using the digital currency or crisis digital currency in an offline digital currency exchange in the crisis digital currency wallet mode—is configured for reduced exchange data storage in order to increase a number of possible offline digital currency exchanges in the crisis digital currency wallet mode.