In 1 week ? Nope, you only can earn up to 0.05btc per week in signature campaign. High rank high payment, but if you talk about a person can earn 1 bitcoin in signature campaign, yes it's possible but it will takes much time. Maybe in 1 year full work on signature campaign you can earn 1 bitcoin. Well, you can earn more by having multiple account which is against the rules and you can get negative trust if you get caught and i really not recommend this.
This high amount of pay for bitcoin can only be done if on 4 weeks you get bonus for avatar or personal message, dont think that at the moment we have some signature campaign that pay this high amount for weekly basis. This is high with current price and for better earning try getting some social media bounties and blog bounties this way you or any other have bigger chances to increase and faster to earn this 1 bitcoin.