The debate over whether layer 2 should be defined solely as Rollup has been heating up, with Vitalik Buterin expressing his thoughts on the matter. In this article, we explore whether restricting layer 2 to Rollup is necessary or if a broader definition could benefit the industry.While Rollup offers flexibility and convenience, other solutions like Plasma and Validium also have their unique advantages. Vitalik suggests that layer 2 should be categorized based on security preferences, creating a distinction between Strong L2 and Light L2. This approach would allow for greater innovation and prevent a monopolization of the layer 2 market by Rollup.He argues that restricting layer 2 to Rollup could limit its potential and make it vulnerable to threats like Celestia's third-party DA. By embracing a more comprehensive definition, Vitalik aims to ensure the longevity and resilience of the Ethereum ecosystem.

小肯尼迪作为美国前总统的侄子，宣布将大部分财富投入比特币，并表示看好其在抗通胀和稳定美元方面的能力。他强调了比特币作为自由货币的重要性，并提出利用区块链技术实现财政预算透明度与政府问责制的愿景。同时，他还承诺建立比特币战略储备，以确保美元的储备货币地位。

近期比特币价格波动剧烈，从突破93,000美元到急跌5000美元，多空双方均遭受重大损失。据Coinglass数据显示，过去24小时全网爆仓金额达8.47亿美元，有超25万人遭清算。

据Onchain Lens数据显示，一个沉睡了14.3年的远古比特币钱包在2010年囤积了2000枚比特币，当时成本仅134美元。如今该钱包的价值已超过1.8亿美元，获利超130万倍。

请帮忙分析比特币历史牛市时间和价格