Polkadot is an active crypto coin currently for sale on most major crypto exchanges, with the coin symbol of DOT.
Polkadot is probably the cutest name for a crypto coin that we've come across to date. However, it's not only cute but is actually doing amazingly performance-wise considering its early conception in May 2020.
The idea of the Polkadot protocol is to allow unrelated blockchains to securely talk to each other, so that value or data can flow between, say, the Ethereum and Bitcoin blockchains without any intermediary. It has also been designed with speed in mind, being speedy yet scalable by making use of parallel blockchains, removing most of the demand from the main blockchain network.