Bitcoin investors watched a long parade of supposed "better Bitcoins" try to dethrone the original. All have faded, but the idea that a more feature-rich version of Bitcoin could take the crown keeps resurfacing. The latest version of that narrative is surfacing in Zcash, a privacy coin. Its supporters argue that it's a cheaper, more capable variant of Bitcoin thanks to privacy features layered onto a Bitcoin-like supply curve. Is Zcash a genuine threat to Bitcoin? Zcash utilizes some of Bitcoin's core architecture, including a 21 million-coin supply limit and a four-year halving cycle that reduces issuance ... (full story)