Zscaler has pulled back, but some investors may perceive it as too expensive.Zscaler (ZS 0.73%) has emerged as one of the top cybersecurity companies. Although it is a leader in zero trust security (hence the name), it offers cybersecurity on several fronts.However, it competes with CrowdStrike, Palo Alto Networks, Fortinet, and others, and investors may hesitate to buy the stock with its forward P/E ratio near 70. Given such conditions, did investors wait too long to buy this cybersecurity stock? Let's tak ...