Modular money is a popular trend that can help solve blockchain scalability issues. It utilizes different technologies to achieve data availability, consensus, and settlement, enhancing the efficiency and scalability of cryptocurrencies. Some platforms offer shared security layers and rollup services, allowing users to stake Bitcoin permissionlessly and earn rewards. There are also many other well-known protocols building their own modular stacks, such as Ethereum, Arbitrum, Optimism, and more. These platforms continue to evolve, offering users more options.