Google's market cap was already at over $100B with billions in revenue and hundreds of millions in profits when it bought DoubleClick and YouTube. So while tho

Google's market cap was already at over $100B with billions in revenue and hundreds of millions in profits when it bought DoubleClick and YouTube. So while those were big aquisitions (Around $3B and $2B) they only accelerated the process of Google turning into the web's central player. It was already set in motion before the aquisitions.