The Polkadot coin is not currently available on Coinbase. Coinbase is a digital asset exchange that allows its users to buy, sell, and store cryptocurrencies.
As of right now, Coinbase only supports four cryptocurrencies: Bitcoin, Ethereum, Litecoin, and Bitcoin Cash. However, there are rumors that Coinbase may add support for more cryptocurrencies in the future, including Polkadot.
If you want to buy Polkadot coins, you will need to use a different cryptocurrency exchange. Some popular exchanges that list Polkadot include Binance, Kraken, and Gate.io.
Before you can trade on these exchanges, you will need to create an account and deposit some funds. Once you have done that, you will be able to buy Polkadot coins with either Bitcoin or Ethereum.
Polkadot is a relatively new cryptocurrency that was created by the Web3 Foundation in 2016. The coin is named after the polka dot pattern because it represents the interconnectedness of various blockchains.
Polkadot is designed to be a scalable and interoperable blockchain network that can support multiple chains simultaneously. The coin is currently ranked 15th on CoinMarketCap with a market cap of over $4 billion.