This blog idea is a cross between the stock market and astrology/numerology. Give a fascinating twist to stock market analysis by combining the trends with numerology. Agree, that this is unconventional, but this unique approach can attract investors and individuals interested in alternative approaches to investing, especially those folks with deep interest and belief in stuff like astrology and numerology.
You will probably need to be something with a passion for the stock market and/or numerology. As you noticed, the niche is the fusion of numerology and stock market analysis, so you would cover topics related to stock predictions, investment tips (based on horoscope, maybe?), and personal finance guidance. Numerology is profitable due to the human nature of trying to decipher the unknown future. You could eventually sell numerology-based investment reports/strategies, affiliate marketing with trading platforms/apps, and later may get enough leads to start offering personalized astrology/horoscope/numerology consultations.
Blog Name Idea: StockmarketNumerology.com