zoobc blockchain nodes project pop blockchainzoo transaction participation coins invest alpha attack rewards scalability signature country fee number decentralisation node consensus team tokens multisignature multisig address-type features txid content exchange update mechanism supply launch hack blocks network buy wallet bitcoin crypto ico objects nfts twins anonymity supplychain cobalt challange alogarithm bloating snapshot spineblock hops snapshots key-sharing mempool philosophy guarantee threat state protection vision emission documents registration desirous bounty betatest advisors attract partnership iteration profit chaos fork miners language article finance adopt key computing quantum supernodes platform restriction business ieo profits news announcement scaling decentralization competition adoption rank founders founder ama