Strong breakdown of the full stack. One thing worth emphasizing more: the data infrastructure layer is genuinely tricky. You mention "indexing systems or third-party APIs," but most teams underestimate how much work it is to reliably track wallet balances, vesting schedules, and transaction history across multiple chains.

Raw RPC calls are slow and rate-limited. Building your own indexer is months of work. A lot of ICO platforms end up with dashboards that lag behind actual blockchain state, which breaks user trust immediately.

Having structured APIs that handle blockchain data collection, normalization, and historical lookups upfront saves you from rebuilding this layer mid-project. APIFreaks.com has geolocation and domain APIs, but honestly any team building multichain token platforms should audit their data pipeline early. That's where most delays happen.