what site are the best site to earn bitcoin?

You may claim from faucets or BTC pay to click sites. But they will surely consume your time. But this is best if you don't have the budget yet.

Or you may do the Pay to post (PTP) programs. I also do this and all you need to do is to look for the sites that offer this and grab your referral link and post it to the automated link viewers and it will generate a passive bitcoin profit.