Cardano co-founder Charles Hoskinson has reacted to Zcash's (ZEC) impressive market cap surge to $10.17 billion. ZEC's price skyrocketed from $40.42 on September 1 to $619, a 1,431% increase over two months. Hoskinson highlighted this development by retweeting a post about privacy coins and mentioning Cardano's upcoming Midnight ZK sidechain, which is in testnet and aims to improve privacy and scalability. Meanwhile, Cardano's ADA token is struggling, trading at $0.5470, down over 33% in the past month.