What is Stacks (STX)?

By CMC AI
28 January 2026 08:50PM (UTC+0)

TLDR

Stacks (STX) is a foundational layer-2 blockchain that brings smart contracts and decentralized applications to Bitcoin, enabling its $500+ billion in capital to be used in DeFi, NFTs, and more.

  1. Bitcoin Programmability – It transforms Bitcoin from a static asset into a programmable base layer for decentralized finance and applications.

  2. Security Inheritance – The network is secured by Bitcoin's hash power, with all transactions settling on the Bitcoin blockchain.

  3. Native Token Utility – STX is used to pay transaction fees, secure the network, and allows holders to "stack" (stake) tokens to earn Bitcoin rewards.

Deep Dive

1. Purpose: Bitcoin's Smart Contract Layer

Stacks exists to unlock Bitcoin's vast, dormant capital for decentralized finance (DeFi) and applications. Bitcoin is the most secure and valuable blockchain, but it isn't natively programmable. Stacks solves this by acting as a separate layer where developers can build smart contracts and dApps that ultimately use Bitcoin as their base asset and settlement layer (Stacks). This allows Bitcoin to move beyond being just "digital gold" and become the foundation for a productive, on-chain economy.

2. Technology & Tokenomics: Proof of Transfer and STX

Stacks uses a unique consensus mechanism called Proof of Transfer (PoX). Here, miners commit Bitcoin to earn newly minted STX, directly tying Stacks' security to Bitcoin's. All Stacks transactions are hashed and settled on Bitcoin, making them as immutable as Bitcoin itself.

The native STX token has three core utilities: it fuels smart contracts (paying gas fees), rewards miners, and enables "Stacking." When holders lock (stack) their STX, they support network consensus and earn Bitcoin yields, creating a direct incentive to participate and secure the network (Stacks).

Conclusion

Stacks is fundamentally a bridge that connects Bitcoin's unparalleled security with the innovation of smart contracts, aiming to build a native financial ecosystem on the world's oldest blockchain. As development continues, will its unique model succeed in attracting the liquidity needed to make Bitcoin DeFi a mainstream reality?

CMC AI can make mistakes. Not financial advice.