In the Vibe Coding era, a question more critical than your first prompt is: “What should I build?”
Having spent the last 20 months as a Solopreneur—concepting, designing, developing, and marketing 5 projects independently—I’d like to share a few criteria I use for selecting what to build.
Founder–Product–Fit
Even if you aren't starting a formal company, choosing the right item for yourself is becoming increasingly vital. While AI handles the coding, every decision point ultimately rests with the human. Here are the three questions I use as my compass:
01.Is this a field I know well?
Or at least, is it something I am genuinely eager to learn? As technical barriers fall, domain expertise becomes your greatest differentiator. Insights rarely emerge from problems you don't care about.
02.Is it technically feasible today?
For beginners in Vibe Coding, this can be the most daunting part. My recommendation: “Build a full-cycle product from start to finish.” I started with a simple diary and English speaking routine service (Genkle) before expanding to blockchain-based projects involving smart contracts and stablecoins (TSF).
03.Can it be profitable?
Profitability is a holistic judgment that goes beyond just adding a "pro" plan:
- Are there actual customers who want to use this?
- How are they solving this problem currently?
- Does the price structure hold up against AI model costs and taxes?
- What are the acquisition channels (CAC) and Lifetime Value (LTV)?
What is the first question you ask when deciding what to build next?
While criteria vary, the core is identifying where the momentum to finish the race comes from.