Denial of service by malicious pool owners is not an issue AFAIK. Pool owners are encouraged to package outstanding transactions in a mined block to claim the a

Denial of service by malicious pool owners is not an issue AFAIK. Pool owners are encouraged to package outstanding transactions in a mined block to claim the associated transaction fees. The only reason a pool owner would deny service is if the transaction has no fee -- which is generally spam. The real problem with bitcoin if anything is transaction scaling. With each transaction broadcast and saved by every node, it's questionable if the network could (or would be willing) to tolerate the load equal to, say, the Visa network. du -hs .bitcoin/ 870M .bitcoin/