My younger brother wanted to open a small shop and had saved ₹5 lakh. I convinced him to let me invest the money for six months because I believed a few mid-cap stocks were ready for a big move. I promised him I would protect the capital.
The portfolio fell and I panicked into leveraged trades to recover. Most of the money disappeared. My brother had to delay his shop by two years. He eventually succeeded without my help, but he has never again discussed money with me.