Polkadot is an open source shard multi-chain protocol that unites multiple blockchain platforms into a unified, scalable network. Not just tokens, any data or asset type can be transferred across the chain, allowing various blockchains to interoperate with each other. This interoperability aims to create a fully decentralized, proprietary network, controlled by its users, and to simplify the creation of new applications, institutions, and services.

To break blockchain islands and create a "blockchain of blockchain". Enabling different types of chains to work and interact safely in the same ecosystem.

The blockchain ecosystem is fragmented and a single blockchain can only handle a limited amount of traffic.

Polkadot is designed to completely solve the problem of being able to scale out and have a lot of parallel chains. Each parallel chain is managed in parallel through different network modes in all aspects, which means that each parallel chain can be a public chain with different consensus and characteristics. Polkadot is a government center, consisting of a central core (relay chain) and multiple departments with different functions (parallel chains), each of which has its own regulations and requirements, but can communicate with each other. The whole system is scalable and allows data exchange between different chains, i.e., cross-chain. Polkadot, on the other hand, provides a simple architecture that places most of the complexity on the middleware (the relay chain). This reduces development risk and allows the necessary software to be developed in a short period of time, with confidence in security and robustness. The complex functions of multiple chains are handled by the relay chain, which can reduce a lot of resource waste, but also improve efficiency, and can meet the different characteristics of the parallel chain can be coordinated under a framework, to solve the problem of isolation.

Boca uses a heterogeneous sharded multi-chain architecture, with various blockchains designed for specific purposes connected to a single ecosystem. These different Layer 1 blockchains are called parallel chains because of the way they process transactions in parallel and are linked together by the Polkadot relay chain.

Used for network operation to protect network security; Pledge DOT to connect the chain to Polkadot as parallel chain; Give holders a vote in online governance.

Proof of Nominating Interest (NPoS), which increases the roles of verifier and nominator to maximize chain security.

Future-oriented design, heterogeneous fragment multi-chain architecture.

The initial issuance of 10 million DOT will be followed by an increase in the total number of tokens through inflation, which, according to the current official model, is approximately 10% when the DOT mortgage rate reaches 50%.

The advantages of Polkadot are obvious. First, it has strong scalability. Supporting multiple blockchains through "sharding" or parallel chains; Second, interactive. Different Polkadot blockchains and applications can share information and functionality; Third, strong specialization. Each Polkadot parallel chain can be customized for a specific use case or application. Fourth, fork-free upgrade. Polkadot can be upgraded without time-consuming and divisive hard forks; New features can be added without completely reinventing the network.

It's hard to say whether Polkadot is better than Cosmos, but overall Polkadot has several advantages over Cosmos: application developers don't need to secure bootlift; Inter-chain messaging is easier with shared security; Substrate development framework is easier to use (WASM, more consensus algorithms and out-of-the-box modules); More focused on arbitrary messaging across parallel chain contract invocations.

The prosperity of Web3.0 ecosystem will lead to the corresponding development of various underlying and application public chains, which will greatly promote the growth of cross-chain demand scale, and even the public chain, alliance chain and private chain have the demand for cross-chain connection.

Cross-chain demand uncertainty, competition with competitors, ecological development to be tested by the market.

As boca's native token, DOT is currently used for governance and pledge. Its value is supported by the collection of transaction fees on the one hand and the parallel chain on the other hand. In order to become the parallel chain of Boca network, a certain number of DOT must be pledged within a certain period of time. DOT is locked for the duration of the pledge. This means that if Boca Ecology is favored by developers, then DOT will be in hot demand in order to compete for a limited number of spots. From the above mechanism, DOT's token mechanism is deeply tied to its Boca network and deeply integrated with its governance, security and usage. If Boca ecology is developed, its governance, safety, and use will create a great demand for DOT. In other words, the value of DOT itself is highly correlated with boca ecological development itself. Some public chains may do well, but their tokens do not necessarily capture value proportional to their ecological development. From this perspective, DOT's token design mechanism facilitates the capture of its future value. The future development still needs to see the development of Boca ecology.