Zcash's technology isn't without limitations. Most often cited weaknesses that the Zcash team is actively working on fixing in the future are
Bitcoin, which had its genesis block mined in 2009, was the first digital currency to scale. While many early adopters took interest in bitcoin because of its promise of privacy, the digital currency failed to provide this benefit, as interested parties can examine the transactions recorded on bitcoin’s blockchain to get a sense of exactly what a person or entity has purchased.
In the years following bitcoin’s release, developers have created privacy-oriented digital currencies including Dash and Monero. Both of these use innovative technologies to help increase the chances of their users remaining anonymous.