Which cryptocurrency is best for a layer 1 network?

When it comes to selecting the best cryptocurrency for a layer 1 network, the choice often boils down to factors like scalability, transaction speed, cost efficiency, security, and ecosystem maturity. Consider Bitcoin, the pioneer of cryptocurrencies, which offers robust security but suffers from scalability issues. Ethereum, on the other hand, has emerged as a leader in smart contract capabilities and has made strides in improving scalability through upgrades like Ethereum 2.0. However, Solana, Cardano, and Polkadot are also contenders, offering high transaction speeds and scalability while maintaining security. Ultimately, the best choice depends on the specific needs and goals of the layer 1 network, including the type of applications it aims to support and the target user base. What are the key factors you would consider in making this decision?