Guides
The explainers behind the tools — written from our own datasets, sourced to primary documents, and updated when the rules change. Six guides, zero filler.
Bitcoin in Your 401(k): What the 2025 Executive Order Actually Changed
The August 2025 executive order didn't put Bitcoin in your 401(k) — it changed who gets blamed if your plan offers it. What savers can actually do now.
CryptoSums Editorial Team · Updated Jul 11, 2026
Crypto Cost Basis Explained: FIFO vs. LIFO vs. HIFO with Worked Examples
Same trades, three basis methods, three different tax bills. How FIFO, LIFO and HIFO work, one worked example across all three, and who may use what.
CryptoSums Editorial Team · Updated Jul 11, 2026
How Much Bitcoin Do You Need to Retire? A Sober Framework
A four-step framework for the 'BTC number': spending target, withdrawal rate, price scenarios and sequence risk — with the honest error bars attached.
CryptoSums Editorial Team · Updated Jul 11, 2026
DCA vs. Lump Sum in Crypto: What 10 Years of Bitcoin Data Says
We backtested monthly DCA against lump-sum buying across five Bitcoin market regimes since 2015. Neither always wins — here's exactly when each does.
CryptoSums Editorial Team · Updated Jul 11, 2026
How Staking Rewards Are Taxed (US, UK, Germany, Australia, Canada)
Staking rewards are usually taxed twice — as income when received, then capital gains when sold. Country-by-country rules, with worked examples.
CryptoSums Editorial Team · Updated Jul 11, 2026
Where Stablecoin Yields Come From (and When 10%+ APY Is a Red Flag)
Every stablecoin yield is payment for a risk someone chose not to hold. The four real sources — T-bills, lending, funding capture, subsidies — and the red-flag checklist.
CryptoSums Editorial Team · Updated Jul 11, 2026