ZIP 2003 states that the Zcash NU7 network upgrade at block height 3,543,405 will disable version 4 transactions, rendering unmigrated funds in the Sprout privacy pool unspendable

How governments worldwide set rules for digital assets through legislation, agency rulemaking, licensing regimes and court fights.

Cryptocurrencies engineered to hide senders, receivers or amounts, led by Monero and Zcash, and the exchange delistings and bans they face.