To be clear, green card paths are not helped or hurt or impacted in any way by the underlying status so your green card options are the same whether you're in O-1 status or not. That being said, because of the nature of the O-1, many of those in O-1 status go the EB1A extraordinary ability path or the EB2 national interest waiver path. An O-1, except in limited circumstances, is tied to a specific employer so if your O-1 employer went out of business, your O-1 would go away - but it's very easy to transfer an O-1 from one employer to another.