This video from Hazard claims to be the only nightclub guide you need for solo money making in GTA Online. Based on the title and snippet, it likely focuses on the passive income side of the nightclub business, which does not require active missions from other businesses. However, the wording "make millions completely solo" may hint at a specific farming method or a repeatable glitch to speed up the process.
If this is a legitimate strategy using the nightclub's warehouse and safe, there is no ban risk. But if it involves an exploit (like duplicating goods or bypassing cooldowns), Rockstar has been known to issue temporary bans or resets. Glitches get patched fast, so do not rely on any specific payout or step from the video without checking recent comments for confirmation. Verify the current working status before investing time or money.
