The strongest usable evidence is the fetched KuCoin page, 'Michael Saylor says it’s “impossible to blockade Bitcoin.” | KuCoin', which explicitly contains the quote and points to a specific X source URL. Additional X search results for @EyeOpenXr_p and @Bioclandestine7 repeat the same wording contemporaneously, which supports that this quote was publicly attributed to Michael Saylor at the time. However, direct fetching of the original X posts failed in this run, so the exact primary-source wording could not be independently validated from the source platform itself. No fetched source contradicted the claim.