Blog

Notes on money, markets, and method.

Essays, tutorials, and the math behind every Coinage feature.

Essay

How Many Years of Your Life Are You Selling to Interest?

By the time you retire, you will have worked roughly seven years for free. The average American pays $300K-$400K in lifetime interest. Translate that into work-years, and the unit changes from dollars into years of your life.

May 5, 2026

Essay

How to Make Your Car Pay for Itself

The average new car costs $42,000. The average buyer pays $51,500. Here is the parallel-line math that turns the same monthly car payment into a portfolio that pays for the rest of your driving life.

May 3, 2026

Essay

How to Get Food for Free

Most people spend $7,200 a year on food, forever. Here is the ten-year math that turns the same monthly grocery bill into something the market quietly pays for.

May 3, 2026

Interactive

Turn any spending category into an investing habit.

Move four sliders: monthly category spend, the slice you choose to invest, expected stock growth, and the profit-take rule that triggers each sale. Watch when gains could offset that category.

April 16, 2026

Essay

You Built This Economy. You Just Forgot to Get Paid.

Your spending powers the economy that drives stock returns. Spend matching puts you on both sides of that loop so market growth funds your everyday life.

April 16, 2026

Essay

From the Coinage Act to the Coinage App

The Coinage Act of 1792 upgraded America from monetary chaos to monetary order. 230 years later, your checking account is still dead stock.

March 29, 2026

Essay

Capitalism and Democracy Are the Greatest Wealth Engine Ever Built

The global economy has generated more wealth in the last century than in all of human history. Here's why most people's money still isn't part of it.

March 29, 2026

Feature

How Spend Match Turns Spending into Investing

Every purchase you make can automatically invest a percentage into your portfolio. Here's how Spend Match works.

March 29, 2026

Tutorial

How to Share Your Nest Publicly

Make your nest public, share your strategy with friends, and publish updates when your allocations change.

March 24, 2026

Tutorial

How to Edit Your Nest

Add new stocks, remove old ones, adjust your allocations, and rebalance your entire portfolio in a few taps.

March 24, 2026

Tutorial

How to Create a Goal Nest

Set a target amount and deadline, pick your stocks, and let Coinage track your progress. A walkthrough on Goal Nests.

March 24, 2026

Tutorial

How to Create Your First Nest

A step-by-step guide to building a custom portfolio and setting up recurring investing in under two minutes.

March 24, 2026

Feature

Nests — Build Your Own ETF in Minutes

Every brokerage built tools around the stock. But you've never believed in a single stock in isolation. Nests let you invest the way you actually think.

March 23, 2026