Crypto asset manager Grayscale Investments has jumped on the Zcash hype by filing for an exchange-traded fund that would give investors exposure to the privacy coin.  A Wednesday filing with the Securities and Exchange Commission shows that Grayscale wants to convert its Grayscale Zcash Trust into an ETF. If approved, it would be the first ETF giving investors exposure to the coin.  Zcash enables users to send and receive money in private by encrypting transaction information using zero-knowledge proofs—a c ...