A new paper warns Russia's digital ruble may struggle to attract global adoption, as Mastercard teams up with an African bank so tokenized transactions can be made using wearable devices.

China's residents get red envelopes in the e-CNY app, while polls show that 59% of Germans have never even heard of the digital euro. Also this week, a cool use case for tokenization.

Pakistan believes a central bank digital currency could support victims of family abuse — and Mastercard's reaping rewards after embracing tokenization.