Hello guys! which site is the best for using bitcoin.

But i have account in two sites. But i don't know which site is the best. which site you like most. But most time i think Coinbase is the best. Because it has three coins of addresses. Such as Bitcoin, Ethereum and litecoin.

Blockchain wallet is a bit buggy and only supports bitcoin, no alts, but as a wallet I would prefer blockchain over Coinbase because you can be sure that your account would not get blocked or banned with funds. In terms of security also, blockchain is good.
But apart from being a wallet Coinbase have buy/sell option and their merchant services are popular so people who prefer these would use Coinbase. But as a bitcoin wallet blockchain is better.