One crypto analyst who says he successfully called several of the market’s biggest moves is now turning his attention to altcoins. Javon Marks says he previously identified Bitcoin’s rise from around $17,000 to above $120,000, XRP’s move from roughly $0.50 to more than $3.30, Ethereum’s climb from the $1,200s toward $4,800, and Zcash’s explosive rally from the $30s.