I examine the parameters that define a good return on investment (ROI) and provide methodologies to identify unrealistic investment claims that may indicate fraudulent schemes. By analyzing and comparing these claims to the historical performance metrics of leading hedge funds such as Renaissance Technologies, I establish a benchmark for assessing investment returns. I also present statistical data on average annual returns of indices like the S&P 500 to contextualize typical market performance. Emphasis is placed on recognizing warning signs, such as guarantees of excessively high daily returns, to aid in making informed investment decisions and avoiding potential scams.