When Bitcoin first appeared in 2009, its price was almost zero dollars, because there was no official market for buying or selling Bitcoin at the time.
Bitcoin was initially mined by its founder Satoshi Nakamoto and was distributed for free or in exchange for certain services. In the first known commercial transaction using Bitcoin, in 2010, a pizza was purchased for 10,000 Bitcoin. At that time, the price of Bitcoin was close to 0.003 cents only.
In other words, Bitcoin was in its early days as an experimental currency that did not have a fixed market value until it was more widely traded later.