It enforces a chronological order within the block chain, protects the neutrality of the network, and allows different computers to agree on the state of the system.

Monero is an open-source cryptocurrency created in April 2014 that focuses on fungibility, privacy and decentralization. Monero uses an obfuscated public ledger, meaning anybody can broadcast or send transactions, but no outside observer can tell the source, amount or destination

Cash App may be a peer-to-peer payment service that permits you to send, receive and request money. … Companies pay App particular fees so customers can use their phones to buy goods and services. It’s essentially a digital wallet that eliminates the necessity for cash or traditional credit cards.

PayPal is the faster, safer way to send money, make an online payment, receive money or set up a merchant account.