I would say way more important is how to identify scams, whether they are online, by phone, mail or in person. Just a basic heuristic on - is this too good to be true? So you can take a pause and go do research. Most of the time, a ticking clock on a “great deal” is just a sales scam, and that “for 10 minutes only price” comes back weekly or is just actually “the price”.

Realize what makes “a call about your cars warranty” or “your credit card rate” spam at best. Take that and apply to more things. Is the car salesman vague about stuff? Probably going to try and screw you. Does the subscription only show the promotional rate? Know to get that ongoing rate before signing up. Just try and hone a gut feeling when things seem off somehow.