This FAQ provides a beginner-friendly overview of nu coin (NU), originally the token for the NuCypher privacy protocol. We'll cover what it is, how it works, how to buy and stake it, and its evolution after the Threshold Network merger.

What is nu coin (NU)?

Nu coin (NU) was the native Ethereum token of NuCypher, a privacy protocol offering end-to-end encrypted data sharing using proxy re-encryption. The project launched its mainnet on Ethereum in October 2020, and NU tokens were used to reward stakers and pay for network services.

In 2021, NuCypher merged with Keep Network to form a shared Threshold Network (T). As a result, NU is now considered a legacy token that can be migrated to T.

How does NuCypher work?

NuCypher uses a cryptographic technique called proxy re-encryption to let a decentralized set of nodes grant and revoke access to encrypted data without revealing the underlying keys. This allows applications to share private information securely, even when the data owner is offline.

Here are the basics of how it works:

  • Data is encrypted with a public key.
  • The owner creates an access policy for specific recipients.
  • Ursula nodes re-encrypt the data for each authorized recipient.
  • Each recipient decrypts the data using their own private key.

This design makes it a privacy and access-control layer for decentralized applications, not an anonymous coin.

How to buy nu coin?

NU is no longer actively listed on most centralized exchanges, but you may still find it on decentralized exchanges like Uniswap if you need to acquire the legacy token. However, the recommended path for most beginners is to simply buy T (Threshold), the token that replaced NU after the merger.

If you do buy NU, you will also need to pay Ethereum gas fees and later use the official Threshold migration contract to convert it. Always verify the contract address from the official Threshold Network site before interacting with any token.

Is nu coin a good investment?

The short answer is that NU itself is a deprecated token, so it is not a good standalone investment in 2026; most investors should focus on the merged Threshold Network (T). That said, the technology behind NuCypher still powers a working privacy network, which may give T some utility.

Pros of holding/using T instead of NU include:

  • Continued development under Threshold DAO
  • Staking rewards for network security
  • Integration with Ethereum privacy tools

Cons include:

  • Competition from other privacy technologies
  • Staking requires a lock-up period
  • Migration from NU adds an extra step for legacy holders

What happened to nu coin after the Threshold Network merger?

In late 2021, NuCypher and Keep Network merged to create Threshold Network, combining their token economies and node infrastructure. NU and KEEP tokens became convertible to T tokens at a fixed rate, and all staking shifted to the Threshold network.

For NU holders, this means taking action: you must migrate your NU to T individually. After migration, NU has no further utility, and old NU tokens remain unsupported by most services. Be sure to complete the migration before relying on any long-term storage.

How to stake nu coin?

You can no longer stake NU, but you can stake T tokens on the Threshold network after migrating. To do this, convert NU to T, then download the Threshold app or use a supported staking interface to delegate to a node operator.

Staking requires you to lock T tokens for a set period. After locking, you must unbond and wait before withdrawing. Stakers earn a portion of protocol fees and milestones, so it is a common way for long-term holders to generate passive income.

What is the difference between nu coin and privacy coins like Monero?

NuCypher (and its successor Threshold) is a privacy infrastructure tool for encrypted data sharing, while Monero (XMR) is a private digital currency designed specifically to hide transaction data. Both address privacy but in entirely different ways.

  • NuCypher protects stored and shared data, not payment history.
  • Monero hides sender, receiver, and amount on a dedicated blockchain.
  • NuCypher is built on Ethereum; Monero has its own independent chain.

Where can I store NU tokens?

NU is an ERC-20 token, so you can hold it in any Ethereum wallet such as MetaMask, Ledger, or Trust Wallet. That said, because NU is deprecated, you should use a wallet that allows you to connect to the official Threshold migration site.

When sending NU, always select the Ethereum network and double-check the recipient address. For ongoing investments, consider holding T directly and storing it in a hardware wallet for better security.

Final Thoughts

Nu coin was an important early experiment in on-chain privacy, but its journey has officially merged into Threshold Network. If you are new to crypto, the main takeaway is that simply holding NU may not be enough—you need to migrate to T to stay active in the ecosystem.

Before investing, understand the difference between privacy coins and privacy infrastructure. Threshold's approach of re-encryption is unique, but the network must still prove itself against broader privacy solutions like zero-knowledge rollups and other L2s.

For 2026, the most practical move is to research Threshold, stake T, and keep an eye on how decentralized access control is used in web3. Always rely on official sources for migration steps and smart contract addresses.