The former billionaire added that he "didn't do a good job" at upholding his responsibilities to regulators, customers, and investors in a hotly anticipated conversation with CNBC's Andrew Ross Sorkin at the Dealbook Summit.Sorkin asked Bankman-Fried what motivated his acquisitions in the crypto industry, given the size of Alameda's borrowing from companies Bankman-Fried intended to acquire.Bankman-Fried claimed that he believed that by the middle of 2022, Alameda had repaid all lines of credit to various borrowing desks."I was nervous [when] the Alameda balance sheet" was exposed by Coindesk, Bankman-Fried said, but expected the damage was going to be limited to Alameda, not an "existential" crisis for FTX.Sorkin pressed Bankman-Fried on Alameda's gambling on questionable cryptocurrencies, reading a letter out from an investor who lost his life savings of $2 million."