Cryptocurrency works through networks of nodes that are constantly communicating with each other to stay updated about the current state of the ledger. With permissionless cryptocurrencies, a node can be operated by anyone, provided they have the necessary technical knowledge, computer hardware and bandwidth. However, not all cryptocurrencies work in the same way. While all cryptocurrencies leverage cryptographic methods to some extent (hence the name), we can now find a number of different cryptocurrency designs that all have their own strengths and weaknesses. The two major categories of cryptocurrencies are Proof-of-Work and Proof-of-Stake. Proof-of-Work coins use mining, while Proof-of-Stake coins use staking to achieve consensus about the state of the ledger. In order to send and receive a cryptocurrency, you need a cryptocurrency wallet. A cryptocurrency wallet is software that manages private and public keys. In the case of Bitcoin, as long as you control the private key necessary to transact with your BTC, you can send your BTC to anyone in the world for any reason.