guides
How to buy Bitcoin: the sober on-ramp, minus the hype
Pick an exchange, verify, buy, self-custody — the four steps that actually matter. No affiliate fog.
Tom Brenner
Lab story: the week fees dismantled our strategy
Our trading lab learned more about fees in one week than from any textbook: trade geometry decides, not win rate.
By Ansel Grau
Lab feed offline …
Guides
All articles →Cornerstone
Relocation
All articles →Cornerstone
auswandern
Opening a US business account for your LLC as a non-resident
You live in Germany, your LLC lives in the US — and the company needs an account. Why banks ask for the EIN rather than your SSN, which papers actually get requested, where reviews go wrong, and why banking, not formation, is the slow part.
Björn Falk
auswandern
Getting an EIN and ITIN: What You Actually Need
The EIN is your LLC's tax number, the ITIN is a personal one. Many mix them up – and pay for something the IRS does for free.
Björn Falk
auswandern
Crypto and a US LLC: Payments, Wallets, Bookkeeping — Plainly
Can a US LLC hold and receive crypto? In practice, yes — through verified business accounts. But nothing becomes tax-free. What actually applies, soberly and with sources.
Björn Falk
Trading OS — in the making
A trading operating system that enforces rules where humans go soft — kill switch included.
The proof runs publicly in the lab →Security
All articles →Cornerstone
sicherheit
Securing your seed phrase: the one step almost everyone puts off
Twelve or 24 words decide who controls your entire crypto holdings. How to store them without losing them — and without ever handing them to someone else.
Petra Stahl
sicherheit
Setting up a hardware wallet safely: the first 20 minutes
A hardware wallet is only as secure as its setup. Five steps you should not get wrong on your first try.
Samuel Okoye
sicherheit
How to spot the 7 most common crypto scams of 2026
Crypto fraud is an industry now — with call centers, AI and off-the-shelf toolkits. These seven patterns are behind most of the losses. Knowing them is how you stop falling for them.
Femi Adler
Wealth
All articles →Cornerstone
vermoegen
My father thought the stock market was a scam. He was almost right.
He held commercial power of attorney and said: that is not a real economy, it is a parallel one. Thirty years later I held his sentence up against the numbers — against the ones that prove him right, and the ones that do not.
Leif Daniel Schmidt
vermoegen
Breathing exercises at the trading desk: what the studies really show
Slow breathing nudges your nervous system in a measurable direction. But the size of that nudge is smaller than most guides admit — and the evidence is thinner than the confidence around it.
vermoegen
Ten years of trading, and I lost most of the money to myself
The tips were right. The analysis was right. I lost anyway — to a stop-loss I did not set and a glance at the fear index I did not take. A confession, with citations.
Leif Daniel Schmidt
Cornerstone
lab
The fee truth: two of our three trading paths were negative after costs
We ran the numbers on our own executions — not the win rate, the friction. On two of three paths, fees ate more than the entire gross profit.
Ansel Grau
One topic, two depths
Important topics appear twice here: as a deep dive for research and as a brief for quick decisions. Same rigour, different altitude.
Deep dive
lab
The fee truth: two of our three trading paths were negative after costs
We ran the numbers on our own executions — not the win rate, the friction. On two of three paths, fees ate more than the entire gross profit.
Ansel Grau
Brief
lab
Lab story: the week fees dismantled our strategy
Our trading lab learned more about fees in one week than from any textbook: trade geometry decides, not win rate.
Ansel Grau
Our graveyard is public
Failed signal variants do not disappear here — they are counted and reported. Trust is our product, so the methodology sits openly on the web.
The weekly letter from the temple
Once a week: what the lab learned, which guides are new and what the market picture is worth — read in 5 minutes, no hype, unsubscribe anytime.