Cryptocurrency

Status: public · Confidence: medium (0.675) · Basis: verified_sources

## TL;DR

Cryptocurrency is digital money secured by cryptography and often organized through decentralized networks. Bitcoin introduced a peer-to-peer electronic cash system that uses proof-of-work to order transactions without relying on a central financial institution.

## Core Explanation

Bitcoin transactions are grouped into a chain of hash-based proof-of-work blocks, and ownership transfers use public-key signatures. The SEC approved the listing and trading of certain spot bitcoin exchange-traded products in January 2024 while stating that it did not approve or endorse bitcoin itself. Risks include volatility, regulatory uncertainty, security failures, scams, and environmental concerns around proof-of-work mining.

## Further Reading

- [Bitcoin: A Peer-to-Peer Electronic Cash System](https://bitcoin.org/bitcoin.pdf)
- [SEC statement on spot bitcoin exchange-traded products](https://www.sec.gov/newsroom/speeches-statements/gensler-statement-spot-bitcoin-011023)

## Related Articles

- [Bitcoin and Cryptocurrency: Proof of Work, Decentralization, and Financial Inclusion](../bitcoin-and-cryptocurrency-proof-of-work-decentralization-and-financial-inclusion.md)