Zuckerberg went on to note that his theme for this year is to focus on "fixing important issues" in technology, media and government. Zuckerberg said the social network has made "too many errors enforcing our policies and preventing misuse of our tools".
He added: "If we're successful this year then we'll end 2018 on a much better trajectory".
Facebook has already vowed to stop rerouting ad revenue through Dublin amid pressure from regulators.
"I'm interested to go deeper and study the positive and negative aspects of these technologies", said Zuckerberg, "and how best to use them in our services".
At the beginning of 2017, as many liberals were grappling with Donald Trump's election and the widening divisions in American society, Zuckerberg embarked on a series of trips to meet regular Americans in all 50 states.
Facebook COO Sheryl Sandberg has welcomed the idea to integrate crypto technology in Facebook services, "Grateful as ever for your leadership and look forward to working with you and our colleagues on these important issues this year".
Zuckerberg acknowledged that many people's opinion on the power of technology had changed. It was a serious year, and I wore a tie every day as a reminder. This year's challenge comes from a very different place - and carries more of the gravity that's expected from the top executive of such an influential company. From learning Mandarin to building an AI assistant for his home, the past few years of challenges have been rather personal.
But Zuckerberg also has little choice but to fix Facebook's problems.
By attempting to take on these complex problems as his annual personal challenge, Zuckerberg is, for the first time, setting himself a task that he is unlikely to achieve.
To foster a less toxic community experience, "crying face" and "angry face" emoji responses will be disabled on any posts published on official Facebook customer support pages, or on the personal pages of Facebook staff. These issues touch on questions of history, civics, political philosophy, media, government, and of course technology. "Back in the 1990s and 2000s, most people believed technology would be a decentralizing force". Today, more than two billion people log into Facebook every month and it is one of the world's most valuable and influential companies-power that is now drawing enormous scrutiny.