This quote is a clever way of saying that there are certain investments that you should never make, as the days of the week all contain the letter ‘y’. Essentially, it’s an advice to avoid buying things that are not valuable or beneficial. The quote is a metaphorical caution against investing in things that don’t yield any returns or are not worth the risk.

Applying this idea to today’s world, it can be used in various aspects of life beyond just financial investments. In the context of personal development, the quote suggests that we should be discerning about where we invest our time and energy. Just as we should avoid bad financial investments, we should also steer clear of habits, relationships, or pursuits that do not add value to our lives or help us grow.

For example, spending countless hours on social media or binge-watching TV shows might be seen as investing in a day with a ‘y’, as these activities often do not yield meaningful returns in terms of personal growth or productivity. Instead, we could be using that time to learn a new skill, read a book, exercise, or spend time with loved ones – investments that are more likely to enrich our lives in the long run.

In the business world, this quote can serve as a reminder for companies to be strategic and discerning about their investments. Whether it’s a new project, a new hire, or a new marketing strategy, businesses need to ensure that their investments will yield positive returns and contribute to the company’s overall growth and success.

In summary, this quote is a reminder to be mindful of where we invest our resources, whether it’s money, time, or energy. It encourages us to make wise decisions that will provide value and positive returns, rather than wasting our resources on things that won’t.