Diagnose and rank the biggest problems holding back decentralized finance

You are interviewing for a product manager role at Coinbase. The interviewer asks for your personal view of decentralized finance (DeFi): financial services such as trading, lending and borrowing that run as smart contracts on public blockchains rather than through banks or brokers. What do you consider the most important challenges facing DeFi at present? Explain why each one matters and how you would rank them. ```hint Look through several pairs of eyes Picture a first-time user, a large financial institution and a team building a protocol, and ask what stops each of them today. Challenges that block more than one group are strong candidates for the top of the list. ``` ### Clarifying Questions - Should the ranking focus on what holds back mainstream consumers, institutions, or the DeFi ecosystem as a whole? - Is the question about DeFi across all blockchains, or about one ecosystem such as Ethereum and the layer-2 networks built on it? - Do you want only a diagnosis of the challenges, or also a view on which of them a company like Coinbase could help solve? ### What a Strong Answer Covers - A brief, accurate definition of DeFi and what it promises, so each challenge has a reference point. - Challenges from several distinct areas (technical, user-facing, legal and economic), each explained through a concrete mechanism or example rather than a buzzword. - An explicit ranking with stated criteria, such as how widely a challenge blocks adoption and how hard it is to fix. - A current view of which problems are being addressed and which remain open. - A product lens: what the challenges mean for the users and products of a company like Coinbase. ### Follow-up Questions - Which challenge on your list is Coinbase best placed to reduce, and what product would you build to do it? - How would you explain the risks of a DeFi lending protocol to a first-time user without either scaring them off or hiding the risk? - If regulation became fully clear tomorrow, which of your challenges would remain, and would any of them get worse?