
Qtum
QTUM · Smart contract platform
Qtum (QTUM) on AltQuick
Qtum is a proof-of-stake chain that keeps Bitcoin's UTXO model and runs the Ethereum Virtual Machine.
Launched in 2017, Qtum is not a PoW/PoS hybrid anymore: staking produces blocks about every 32 seconds, with a decentralized governance protocol that can change parameters such as block size without a hard fork. Solidity contracts run on an EVM sitting on Bitcoin-style outputs, which is a different bet than account-based chains. QTUM pays for gas and staking. We list it for traders who want that UTXO-plus-contracts combination against Bitcoin.

