On a deeper level, the phrase "don't take any wooden nickels" is also about valuing honesty and integrity. It's a reminder that true wealth and success come from being genuine and authentic, not from trying to deceive or manipulate others. By living with integrity and being true to yourself, you'll attract positive relationships and experiences into your life.
As you go about your day, remember that you have the power to choose how you live your life. You can choose to be wise and cautious, or you can take risks and see where they lead. Either way, always keep in mind that knowledge is power, and the more you learn, the more you'll grow.