Coinbase Bitcoin Trading Revenue Down 20% Month over Month: Root-Cause Diagnosis

You are the product manager at Coinbase who owns the bitcoin trading brokerage business. This month's brokerage revenue came in 20% below last month's. As the owner of this area, what steps would you take? ```hint Market or product? Before hunting for a product bug, ask how much of the drop the market alone could explain. Then break revenue into a few factors you can check one at a time. ``` ### Clarifying Questions - Is the 20% measured on monthly totals or on daily averages, and do the two months have the same number of days? Crypto trades every day, so month length matters. - Did the decline arrive suddenly on one date or build gradually through the month? - Does brokerage revenue here include only fees on simple bitcoin buys and sells, or also advanced trading and spread income? - Is the drop concentrated in a region, platform or customer type, or is it broad? ### What a Strong Answer Covers - Validating the metric before diagnosing it: definitions, data pipelines and calendar effects - Separating market-driven causes such as price and volatility from causes specific to Coinbase, using an outside benchmark - A decomposition of revenue into traders, trades per trader, trade size and fee rate, followed by segmentation - A check of the trade funnel and recent changes such as releases, fees, payments and verification steps - An action plan per root cause, with monitoring and a clear update to leadership ### Follow-up Questions - Suppose the funnel shows more users abandoning at order confirmation since a recent release. How do you prove the release caused it and decide what to change? - Industry-wide bitcoin trading volume fell by the same amount. Is there anything left for you to do? - What would you monitor so the next drop is caught within days rather than at month end?