Cardano was created by one of the co-founders of Ethereum, so it shares many similarities to its crypto competitor. It also serves as a platform for smart contracts, which is one of the biggest advantages of Ethereum.
Also, while Ethereum is currently transitioning from a PoW network to a PoS network, Cardano already uses a PoS system. That makes it more environmentally friendly and faster than its competitors.
Like Bitcoin, Cardano also has a limit on how many tokens can be produced, which creates a sense of scarcity and can help drive up its value over time.