A cryptocurrency, crypto-currency, or crypto is a digital asset
A cryptocurrency (or “crypto”) is a digital currency that can be used to buy goods and services, but uses an online ledger with strong cryptography to secure online transactions.
What is Polkadot?
Security for everyone
Easy blockchain innovation
DOT cryptocurrencies as the currency of the future
https://polkadot.network/PolkaDotPaper.pdf
Mining
Cryptocurrency mining is the process in which transactions between users are verified and added to the blockchain public ledger. The process of mining is also responsible for introducing new coins into the existing circulating supply and is one of the key elements that allow cryptocurrencies to work as a peer-to-peer decentralized network, without the need for a third party central authority.
How does it work?
A miner is a node/device in the network that collects transactions and organizes them into blocks. Whenever transactions are made, all network nodes receive them and verify their validity. Then, miner nodes gather these transactions from the memory pool and begin assembling them into a block (candidate block).








