
In the rapidly evolving landscape of cryptocurrency, the classification of tokens as securities is a topic of significant importance. Determining when a token falls under the purview of securities regulations involves various factors, including the application of the Howey Test. Furthermore, the level of decentralization and the role of sequencers in Layer 2 rollup platforms play a crucial role in understanding the potential security classification of these innovative solutions. This article explores these aspects in detail to provide insights into the evolving nature of Layer 2 rollups and their potential status as securities.
I. When is a token considered security?
A. The Howey Test: Defining the Boundaries
To establish whether a token qualifies as a security, the Howey Test, derived from a U.S. Supreme Court case, provides a fundamental framework. The Howey Test consists of four criteria that determine whether a transaction can be classified as an investment contract:

1. Investment of money: Participants must contribute capital, typically in the form of fiat currency or cryptocurrency.
2. Common enterprise: The investment is made in a collective endeavor where investors pool their resources.
3. Expectation of profit: Investors anticipate earning profits from their investment.
4. Derived from the efforts of others: The success and profits of the investment rely primarily on the efforts of others rather than the investor's own actions.
B. Bitcoin and Ethereum: Non-Security Status Explained
Analyzing the Howey Test criteria, it becomes apparent that Bitcoin does not meet the definition of a security. While Bitcoin fulfills the first three criteria, it lacks a common enterprise and does not rely on the efforts of others for profit generation. Ethereum's classification is more nuanced due to the presence of factors that could potentially align with the Howey Test. However, the Ethereum Foundation's initiatives, such as the Shanghai update, aim to reduce centralization and mitigate the perception of Ethereum as a security. By allowing users who stake Ethereum to withdraw, the network eliminates the concentration of power and reduces the foundation's influence, solidifying its non-security status.

II. Are Layer 2 Rollups decentralized enough to be considered securities?
A. The Crucial Role of Sequencers and Decentralized Mechanisms
Layer 2 rollup platforms, such as Optimism and Arbitrum, introduce innovative solutions for scaling blockchain networks. The functioning of these platforms relies heavily on the concept of sequencers, who possess the authority to order and execute transactions within the network. The level of decentralization achieved by Layer 2 rollups is a critical factor in determining their potential classification as securities.
B. Operators of Sequencers: Optimism & Arbitrum
At present, Offchain Labs serves as the sole sequencer operator on Arbitrum, while Optimism is operated by the organization that developed it. The concentration of sequencer operations within a single entity raises questions regarding the level of decentralization in these platforms. The prominence of these operators implies a centralized approach, which could potentially impact the security classification of Layer 2 rollups.

C. The Future of Rollups and the Influence of Sequencers
The future development of Layer 2 rollups and their security classification relies heavily on the role and influence of sequencers. Several potential designs for sequencer hierarchy have emerged, each with its implications. These designs aim to enhance use cases for sequencers:
Centralized sequencer: This prevailing approach, utilized by platforms like Arbitrum and Optimism, emphasizes efficiency. However, it relies on a single operator, introducing potential risks and concerns regarding decentralization.
Sequencer auction: An alternative approach involves conducting periodic auctions to determine the sequencer operator. This design allows for wider participation and introduces market dynamics, potentially enhancing decentralization.
Random selection from PoS set: In this model, specific requirements are set for becoming a sequencer operator, such as hardware capabilities and bonding token holdings. Individuals meeting these criteria have the opportunity to operate the sequencer, with selection occurring at regular intervals.
Random selection from DPoS set: Similar to the previous approach, this design includes a limited number of individuals who can become sequencer operators. Platform token holders can delegate their tokens to qualified entities, and rewards are shared among the delegators. The probability of being selected as a sequencer operator is proportional to the staked and delegated tokens.
III. Conclusion:
The security classification of Layer 2 rollups is intricately linked to their level of decentralization and the influence of sequencers. While Bitcoin and Ethereum have successfully established their non-security status, Layer 2 rollups are in a crucial developmental phase, with ongoing efforts to enhance decentralization. The evolution of sequencer designs and their implementation will shape the future of these platforms and determine their potential classification as securities. Understanding these dynamics is essential for industry stakeholders navigating the regulatory landscape and fostering innovation in the blockchain ecosystem. As Layer 2 rollups continue to mature, achieving higher levels of decentralization will be instrumental in mitigating regulatory concerns and solidifying their position as efficient scaling solutions for blockchain networks.