System 6 — Minimal Two-Platform
SoFi Invest and Coinbase. A deliberately small starter system with one brokerage and one on-ramp.
Who this is for
Readers who want the smallest possible coherent stack while they decide whether the framework fits.
System layers
- On-ramp: Coinbase. Single regulated US exchange.
- Yield venue: SoFi Invest. Commission-free brokerage with optional robo. Single venue; redundancy is intentionally absent at this stage.
Cadence
Quarterly review.
Why it works
Lowest possible friction. Practicing the cadence is the point.
What breaks it
Stopping here. A two-platform stack has no redundancy and should evolve into a three or four-platform system within a few months.