Regarding technology, the only enterprise blockchain applications that are currently operational are small-scale, single-owner applications such as Everledger's blockchain that tracks the ownership of certified, cut diamonds. Everyledger (Fig \ref{134948}) owns and manages its blockchain which tracks over 1.6 million diamonds. But diamonds don't trade at a high frequency. Most are held for years. Large payments systems such as VISA currently process payments at a rate that would allow the entire population of Everledger-tracked diamonds to be handled in just over 1 minute (~24 thousand transactions per second). Among popular blockchains, Bitcoin processes only 7 transactions per second and Ethereum handles only 20 tps. There is not a hard limit to blockchain processing speed. But new innovations are needed to support the high throughput and confidentiality requirements of such enterprise applications. For example, BigChainDB, which is not a true blockchain, but offers many of its desirable features, claims to be able to process 1 million transactions per second.