The story says Zcash rose to almost 1.5% of Bitcoin's market value and could gain more. That suggests possible competition, but reports no change in Bitcoin use or demand, so its outlook stays unchanged.
Zcash now represents almost 1.5% of Bitcoin's market value, and Grayscale says it could gain more. That points to possible competition, but the article reports no lost Bitcoin users or demand. It describes a possibility, not a change to Bitcoin's outlook.
XRP is compared with Bitcoin at nearly 6% of its market value, but the story reports no new change for XRP. Zcash's possible growth does not show that XRP is losing users or demand.
Ethereum is named as one of crypto's established leaders that Zcash could challenge. The story reports no change in Ethereum's use or demand, so its outlook stays unchanged.