Unless Bitcoin upgrades its core cryptography in the next five years, the trust it has built over 16 years could be wiped out by a single quantum attack. Urgent upgrades are needed to protect the world’s leading cryptocurrency. Satoshi Nakamoto changed how we define money. In response to the 2008 collapse of the financial institutions in which millions put their trust, Satoshi created a decentralized monetary system built on elliptic curve cryptography. This combination of cold math and decentralization was a powerful one, attracting not only diehard skeptics but also the world’s largest financial institutions, such as BlackRock. In the...