In the field of digital currency, some old-line currencies have a close relationship with AI:

1. Ethereum (ETH)

- **SingularityNET:** A decentralized AI market built on Ethereum.

- **Ocean Protocol:** Provides a decentralized data market for AI use.

2. Bitcoin (BTC)

- **Basic Technology:** Although there is no direct AI application, its blockchain technology provides an environment for AI data storage and processing.

3. EOS

- **Effect.AI:** A decentralized AI development platform running on EOS.

4. IOTA

- **Data Market:** Using Tangle technology, it provides real-time data for AI systems, especially in the field of Internet of Things (IoT).

OpenAI and Digital Currency

OpenAI has not issued any digital currency, but its AI technology has a potential impact on the application of blockchain and digital currency, and may improve the automation processing capabilities of smart contracts by improving technologies such as natural language processing.