CryptoFumble — What Could You Have Made?

What it does

CryptoFumble shows you exactly what your money would be worth today if you'd bought any coin, any amount, on any date. Type in your regret, get a receipt. Live prices from CoinGecko, plus a shareable "proof of regret" card for when the number gets ridiculous.

See exactly what your money would be worth today if you

Pick a coin, an amount, and a date you didn't buy — find out exactly what that decision cost you. Painful, but useful. Prices flow through our own caching proxy (Netlify function → CoinGecko), with a fallback to a direct call and then to demo data if everything else is unavailable. The source is always shown on the receipt. Stored only in this browser, on this device — clear your browser data and it's gone. Not synced anywhere, not investment advice. Live prices come from CoinGecko, through our own caching proxy. If the live API is briefly unavailable, the calculator falls back to an approximate historical dataset for a handful of major coins — clearly marked "OFFLINE DEMO DATA" right on…from cryptofumble.com

• 
  What if you had invested in Cryptocurrency?2017 · ▲166

  See how much you could have made investing in Cryptocurrency

• 
  If You Bought XYZ2020 · ▲78

  How much money you would have made investing in the past.

• 
  Bitcoin or Stupid Shit2021 · ▲114

  See how much your dumbest purchases would be worth in BTC

• 
  Net Worth in Crypto2017 · ▲94

  Find out just how much of your net worth is in crypto.

• 
  CryptoShark2019 · ▲74

  Get the value of any crypto currency in real time.

• CY
  Calculate Your Crypto Regret2021 · deepnote.com · ▲11

• 
  PaymentKit▲466

  Billing that survives a processor shutdown

  Commerce · 13d ago · paymentkit.com

• 
  Equitybee Benchmark▲241

  Compare your startup equity grant for free.

  Commerce · 26d ago · equitybee.com

• TL
  The load-bearing vocabulary of Claude▲703

  Life & fun · 10d ago · louisabraham.github.io

• 
  Hey Noah▲641

  A proactive AI executive assistant for founders

  AI · Aug 2026 · heynoah.io

• 
  Clipto MCP▲640

  Let agents source clips from terabytes of your local video

  Work · 18d ago · clipto.com

• SA
  Simple algorithm and color space to generate diverse skin tones▲627

  Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…

  Life & fun · Aug 2026 · toneyalexander.github.io

• 
  AdAnt AI▲608

  Claude for viral, high-converting social ads

  AI · Aug 2026 · adant.ai

• 
  I trained a 125M model to autocomplete piano on-device▲598

  I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.

  AI · 17d ago · simedw.com