The XRP Ledger permission flaw addressed by the fixCleanup3_4_0 amendment allows accounts authorized only to destroy issued tokens to create new tokens under certain conditions, while leaving XRP's own supply unaffected

Digital assets that run on blockchains rather than banks, from Bitcoin and Ethereum to thousands of smaller tokens.

How blockchain protocols make collective decisions about upgrades, funding, and rules, whether through on-chain voting, off-chain social consensus, or foundation stewardship.

Cryptocurrencies beyond Bitcoin, with their market rotations, notable launches and collapses, and the line between innovation and speculation.