The "best" currency on the @Polkadot Network is subjective and depends on your investment goals and risk tolerance. However, here are some of the top-performing and promising currencies on the Polkadot network:

Top Polkadot Ecosystem Coins by Market Cap:

* Polkadot (DOT): The native cryptocurrency of the Polkadot network, DOT powers the network's security, governance, and staking.

* Kusama (KSM): Often referred to as Polkadot's "canary network," Kusama is a testbed for new features and technologies before they are implemented on the main Polkadot network.

* MANTRA (OM): A DeFi platform built on Polkadot that offers staking, lending, and yield farming services.

Other Notable Polkadot Ecosystem Tokens:

* Acala (ACA): A decentralized finance platform built on Polkadot that offers a variety of financial services, including lending, borrowing, and trading.

* Moonriver (MOVR): A fully Ethereum-compatible smart contract platform built on Polkadot.

* Bifrost (BNT): A liquidity protocol that allows users to stake their DOT and KSM tokens and earn rewards in the form of liquid staking derivatives.

Important Considerations:

* Do Your Own Research (DYOR): Before investing in any cryptocurrency, it's crucial to conduct thorough research and understand the risks involved.

* Diversification: Consider diversifying your investments across multiple Polkadot ecosystem tokens to reduce risk.

* Long-Term Perspective: The cryptocurrency market is highly volatile, so it's important to have a long-term investment horizon.