The fourth largest cryptocurrency, by market cap, is Cardano (ADA). The price of a single ADA token is now marginally higher than $0.88, following a 31 percent rise in the past week. As of 6:30 p.m., the market cap for Cardano was $28.2 billion. Pacific time on Monday, a smidge higher than the $27.6 billion Polkadot. Cardano is a proof-of-stake network with a strong focus on intelligent contracts and smart contracts.