Cmc? Coinmarketcap.com? Can this website give me data for before july 2010?
Yes, go over to the site or download the app for better convenience and click on Bitcoin assets, you'll see the historical price button then click on it to select the year, date and the price, you'll get it there.
You can also check on coingecko, that's another marker capitalisation site for checking historical price action on various crypto, find Bitcoin and follow the same process above.
If there's no data, it means, the possibility that it was not available in the trading market is high. Also, if you cant get it, what's the big deal? Is there some significance on this query? What is the OP trying to exhaust from here?