No, Bitcoin will most likely keep increasing in price so it's never going to be too late to buy. However, the longer you wait, the lower your potential to make money.

Bitcoin was designed so that the number of mined coins gradually decreases over time and there will never be more than 21 million Bitcoins in existence. The coins will become more scarce as fewer are mined and more are lost. As the coins become more scarce the price is just going to keep rising.