Justin Hertzberg is CEO of FPFX Tech, PropAccount and BullRush, leading prop firm technology and white-label solutions.getty​Many proprietary trading firms that I've seen collapse, pause or falter in recent years did not fail due to a lack of demand. They did so because something underneath the business broke: A payment processor froze their account, a system failed during a volatile session, risk management failed at crucial moments or manual operations buckled under volume they were never built to handle. Public discussions surrounding prop firm success typically focus on marketing, challenge design, profit splits and trader acquisition. But I believe the real factors that determine long-term stability sit beneath the surface: payments, risk systems, technology framework and operational automation. These are not supporting functions. They are the business itself.​There are three technology problems that I've found tend to be underestimated at launch. These problems can become even more critical once a firm has real volume.1. Payment Infrastructure Is A Structural RiskPayment processing is often seen and treated as a utility layer. In practice, I've found it is one of the most consequential components of the entire operating model.Transaction environments with higher dispute rates typically include reserve requirements, increased fees and ongoing monitoring by card networks. Accounts can be restricted or terminated if dispute thresholds are breached, often with little warning. Visa's consolidation of its dispute and fraud monitoring into the Visa Acquirer Monitoring Program reinforces how narrow the margin for error is here. For prop firms, this dynamic is even greater: The core business model naturally tends to generate dispute behavior, as traders who fail challenges frequently initiate chargebacks.​The primary risk here is dependency concentration. As such, relying on a single processor can introduce systemic exposure. Operators can mitigate this by diversifying across multiple providers and incorporating alternative settlement rails. The objective is not only transaction acceptance, but continuity of operations under changing network conditions.At different points in time, I've seen licensees of our technology fail because a payment processor went dark or began holding reserves. Without alternatives, these licensees had their cash flow choked off, despite the rest of the business continuing. This single point of failure was enough to trigger delays, halts and, in some cases, outright business failures. 2. Downtime Is A Trust Event, Not A Technical IssueIn most online businesses, downtime often results in lost transactions. In trading environments, it can result in lost trust. A single execution failure during a volatile market event can escalate beyond a technical incident. Traders sharing screenshots, communities reacting in real time and reputational damage can spread faster than any resolution effort.The most damaging failures, however, are rarely complete outages. In my experience, they are partial degradations: latency increases under load, risk engines that batch process instead of operating in real time and onboarding flows that fail intermittently during peak demand. The question for any scaling financial business is not whether systems work under normal conditions, but whether they remain stable under peak volatility, when both user activity and market pressure are at their highest. This is what you should plan for in your design stages and test after launch.3. Operational Complexity Can Scale Faster Than RevenueMost growth models function under the assumption that operational complexity scales proportionally with revenue. In reality, I've found that it scales nonlinearly.At early stages of your launch, manual workflows are efficient. Small teams manage payouts, verification and support through centralized processes. But as volume increases, these systems can start to fragment. At mid-scale, workflows can become dependent on individuals and informal processes. At higher volumes, manual systems can become structural bottlenecks. Core functions like payout processing, identity verification, risk review and dispute handling do not scale with staffing alone. The most common failure pattern I've observed is when customer acquisition scales faster than operational infrastructure. This imbalance eventually surfaces as delayed payouts, growing support backlogs and inconsistent user experience. At scale, operational inefficiency is no longer a cost issue; it is a trust issue.Nearly every entrepreneur starts as a small-business operator. The pivot from manual to automated, from small business to scaled business, is difficult for many operators. That transition requires reliable tech and sufficient workflows. If you want to watch your business scale, you need to invest in your technology, infrastructure and AI to streamline and unify those processes before they get out of hand.What This Means Beyond Prop TradingWhile these examples are drawn from the prop trading industry where I work, the underlying principles can apply to any scaling, transaction-driven business. Technology handling payments, uptime, risk and verification defines business reliability as much as product or marketing. Single dependencies on any provider can introduce fragility that only becomes more visible under stress. Operational complexity often scales faster than revenue, and without automation, growth can increase friction faster than efficiency. Users will judge your platforms on their behavior under peak conditions, not on design intentions.These dynamics extend across fintech, SaaS, marketplaces and any business where transactions, timing and reliability intersect.The Real DifferentiatorThe prop trading industry is often framed as a marketing-led space. In practice, I believe it is a technology-led space. From what I've seen in the industry, most firms do not fail because of insufficient demand. They fail because their systems cannot sustain scale, volatility and real-time execution.As the industry matures, the primary differentiator will shift from acquisition strategy to operational resilience. In modern financial businesses, your technology is not what supports your prop firm. Your technology is your prop firm.Forbes Technology Council is an invitation-only community for world-class CIOs, CTOs and technology executives. Do I qualify?