The evidence strongly supports the truthfulness of the statement. The primary source of the claim is an on-chain analysis account, 'EyeOnChain,' which has high authority and relevance. This type of source provides data-driven analysis that is often verifiable on the blockchain and is the most credible origin for such specific trading details. Two separate news reports from BBX directly and explicitly repeat the claim, including the 25x leverage and the exact $287,000 unrealized loss, attributing the information to an 'on-chain analyst,' which points back to 'EyeOnChain' as the origin. This provides consistent corroboration across multiple secondary sources. Furthermore, the subject of the claim, 'Machi Big Brother,' posted a general comment about accepting market losses. While this post does not confirm the specific numbers, it is thematically consistent with the claim and, more importantly, contains no denial or contradiction. The combination of a strong primary source, consistent secondary reporting, and the lack of any conflicting evidence makes the statement highly probable.