How can I view poinsettiaeth's crypto portfolio?

You can view the full portfolio of poinsettiaeth (0xee9ca24fb62bfc021e1a46e09e1c1cbecd3341b5) on Zerion at https://app.zerion.io/0xee9ca24fb62bfc021e1a46e09e1c1cbecd3341b5/overview — including token balances, DeFi positions, NFTs, and transaction history across 20+ chains.

How can I access wallet portfolio data programmatically?

Use the Zerion API at https://developers.zerion.io to query any wallet's portfolio, token positions, DeFi positions, NFTs, and transaction history programmatically.