Add Rule of 72 in section ‘Compound Interest & Long-Term Savings’,
What is this? I don't claim to know a lot about Bitcoin, but I never heard about a "Rule of 72".
Add ‘Bitcoin & Crypto Tax Action Checklist’,
Review section ‘Tax System: How Bitcoin & Crypto are Taxed in Countries’, update year 2026 tax’s rules,
I briefly looked over the section "Tax System: How Crypto is Taxed in Countries". Not sure if I missed it, but I'd add a clear disclaimer that details are provided to the best of your knowledge and belief, no tax (legal) advise is provided, DYOR and it's always the readers obligation to follow their own country's tax rules.
While I strongly believe that the tax topic is very important and especially beginners should pay attention to it from their very start, it's a section of high maintenance and likely would need frequent updates. You clearly point out that basically every country has their own tax rules regarding crypto coins.
I don't know if you really want this maintenance burden. Though it might be OK to point out that the provided details are as of "best knowledge and intent" of a certain date and it's always the responsibility of the reader to check and apply their specific country's tax rules and updates.
Hi, thank for feedback.
Rule of 72, ahh, it is a way to estimate in how many year you can double your savings.
Just divide 72 by the annual feed rate and you get the years.
Example, annual feed rate of 10%, so divide 72 by 10 and you need 7.2 years to double your value.
It is approximate but it's help easily!
For Tax, one day I cannot update the (Mini)-Guide anymore, so for that the document is tracked by versioning and release date.
But, Joke on, you need to read on page 4 my Foreword, and you will see an important advice:
"Many translations, edits, sections and enhancements were assisted by AI tools such as ChatGPT, which helped produce this guide efficiently and quickly.
I personally reviewed the content, but as I am not an expert, some information may be incomplete or contain errors.
Please consider: always verify critical details yourself, especially tax rules and procedures for converting cryptocurrencies into fiat currency in your jurisdiction.
This guide is educational, not legal, not tax or not investment advice!"
Also, in the Tax section itself, in next version 6.0, we can read:
"Country comparisons, Here are how the rules (checked beginning of year 2026) differ in USA, Mexico, Germany, France, Spain, Poland, India and Brazil:..."
I tried to find a way to put the reader on the right path, for sure, I cannot update in every release!
I am myself surprised that I am already with Version 6.0 ongoing, the Bitcoin World is so large, and I miss things that are learned every day

The Bitcoin community is so engaged, I try to give back what the community give me, and thanks to all of you for that.