How can I view 12021975eth's crypto portfolio?

You can view the full portfolio of 12021975eth (0xc04f3089143e6dd3d412751b08a0855e146a1322) on Zerion at https://app.zerion.io/0xc04f3089143e6dd3d412751b08a0855e146a1322/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.