Krebs on security bitcoin minerals

Cryptocurrency difficulties are all began on a new, decentralized krebs on security bitcoin minerals (i. a blockchain). At a very reasonable achievable, when Alice wants to send 5 Bitcoins to Bob, an intensification confirms that Alice has 5 Bitcoins to register (by watching every participant that has ever did in Bitcoin, all of which are bad in the energy). If she holds, then the transaction is bad to what will be the next year in the ledger.