Here are the top 5 cryptocurrencies by market capitalization:

1. Bitcoin (BTC): The original and most well-known cryptocurrency, created in 2009 by Satoshi Nakamoto. Market capitalization: over $2.5 trillion.
2. Ethereum (ETH): A decentralized platform that enables the creation of smart contracts and decentralized applications (dApps). Market capitalization: over $500 billion.
3. Ripple (XRP): A real-time gross settlement system (RTGS) and a cryptocurrency built to enable fast and cheap international payments. Market capitalization: over $200 billion.
4. Tether (USDT): A stablecoin pegged to the value of the US dollar, designed to reduce the volatility of cryptocurrencies. Market capitalization: over $150 billion.
5. Litecoin (LTC): A peer-to-peer cryptocurrency created as a faster and cheaper alternative to Bitcoin. Market capitalization: over $100 billion.

Note: Market capitalization figures are subject to change constantly and may fluctuate based on various market factors.

These five cryptocurrencies are often considered to be among the most widely recognized and widely used cryptocurrencies, although there are many other cryptocurrencies available in the market.