Your idea of using blockchain technology, specifically Ethereum, as a distributed/decentralized database is indeed a promising venture. Ethereum's smart contract functionality and decentralized nature make it well-suited for creating a transparent and tamper-resistant database where no single entity owns the data.

Considering your objectives, Ethereum's capability to record transactions as new data points aligns with the concept of a decentralized database. The ability to query data via API and aggregate it on the client-side offers flexibility and accessibility.

While Ethereum is a strong contender, it's worth exploring other blockchain platforms depending on your specific requirements. Platforms like Cleveroad (https://www.cleveroad.com/industries/fintech/blockchain/) specialize in blockchain solutions for the FinTech sector. Their expertise might provide valuable insights into alternative platforms or tailored solutions that align precisely with your project goals.

In the rapidly evolving landscape of blockchain technology, collaborating with experienced development teams can ensure a smooth and effective implementation of your decentralized database concept. Feel free to reach out to Cleveroad for a detailed discussion about your project and potential solutions.

Best of luck with your endeavor to create a decentralized database, and I hope it evolves into a successful and community-driven platform!