What is a good Lambda?

What exactly constitutes a "good Lambda" in the world of finance and cryptocurrency? Is it solely determined by its performance in terms of profitability and return on investment? Or does it also encompass factors such as stability, scalability, and ease of use? Additionally, how does one assess the potential of a Lambda, especially in the highly volatile and unpredictable realm of crypto, where trends can shift rapidly? What metrics or indicators should investors and practitioners consider when evaluating a Lambda's quality and suitability for their portfolios?