That's the value a new report from financial research firm Trefis puts on Facebook, if a lot of things work out. And a new monetization plan that lets advertisers "sponsor" your actions on Facebook could give it a huge new revenue stream and contribute to that lofty valuation. Continue reading Why Facebook Could Be Worth $125 Billion Why Facebook Could Be Worth $125 Billion originally appeared on DailyFinance on Tue, 25 Jan 2011 15:00:00. Filed Under: Company News , Technology , Investing , Goldman Sachs , Google Permalink | Tweet this! | Comments