Cryptocurrency advocacy group DeFi Education Fund (DEF) has submitted an amicus brief to the U.S. Court of Appeals, supporting an appeal against the IRS. The case involves the 2017 order in which Coinbase was required to provide data from over 14,000 users. DEF argues that the unique characteristics of blockchain technology must be considered when assessing cryptocurrency users' privacy rights under the U.S. Constitution's Fourth Amendment. The group contends that the government's access to such data profoundly impacts users' privacy, exceeding the scope of traditional banking records. The case's outcome could establish a significant precedent for digital privacy rights in the U.S.