How to tell a rising market from a fad
The money is in catching a trend on the way up, not after everyone's piled in, but a spike that fades leaves you with dead stock.
The move is to run four honest tests, sustained growth, repeat-purchase potential, who else is entering, and exit risk. AI can pull the evidence while you make the call.
Fastest path: one prompt, end to end
🤖 AI prompt — paste into ChatGPT / Claude
You are a trend analyst. Judge with real data only, from tools you open.
Product/trend: [e.g. mushroom coffee]
Market: [e.g. US]
Run these four tests and score each rising / fad / unclear:
1. Sustained growth: open Google Trends (trends.google.com), read 5 years. A steady multi-year climb = rising; one sharp spike then decline = fad. Describe the shape you saw.
2. Repeat-purchase potential: is this a consumable people rebuy, or a one-time novelty? Rebuyable trends last; novelties don't.
3. Who else is entering: check the marketplace bestseller list and Google News for new brands and funding (if you have TrendTrack, also check which stores in the category are growing and whether ad spend is rising). Serious money entering = real; crickets = early or dead.
4. Exit risk: if this fades in 12 months, am I stuck with inventory or do I have a flexible offer? State the downside plainly.
If you can't browse, leave the test blank and name the tool to open (trends.google.com, the bestseller list, Google News).
If a number is missing, ask; do not guess.
Output: a 4-row table (test / evidence / verdict) + one overall call: enter now, watch, or skip.
Or do it in 4 steps
- Test for sustained growth, not a spike. In Google Trends, a fad looks like a single mountain, up fast and down fast (think fidget spinners). A trend climbs over years or steps up and holds. Set a 5-year window and read the shape before anything else.
- Ask if people rebuy it. A consumable people reorder (coffee, skincare, supplements) compounds; a one-time novelty needs constant new buyers to survive. Rebuyable trends give you a customer base; novelties give you one sale and a churn problem.
- See who else is entering. New brands and investor funding in a category signal real, growing demand; an empty field means you're early or it already died. A paid tool like TrendTrack shows which stores are growing and whether ad spend is climbing, so money entering is easy to spot.
- Price in the exit risk. Before you commit, ask what happens if it fades in a year. A flexible, low-inventory offer (print-on-demand, dropship, a service) lets you ride a fad safely; a warehouse of custom stock does not. Match your bet to your downside.
Worked example (labeled): mushroom coffee, US. Trends shows a multi-year step-up that held (rising, not a spike), it's a consumable people rebuy weekly (strong), and several funded brands entered 2022 to 2025 (real demand).
Exit risk is low if you start dropship before committing to bulk. Verdict: enter, but keep inventory light until reorders prove out.
Contrast fidget spinners, a 2017 mountain with no rebuy, which punished anyone who bought stock late. Numbers are illustrative; verify in the live tools.
Catch it climbing and rebuyable, not spiking; let AI pull the evidence and you own the enter-or-skip call.