Cryptocurrency · Bitcoin · Blockchain · Node.Js
Build a Blockchain and a Cryptocurrency from Scratch: is it worth it?
by David Joseph Katz · Intermediate · Development
Updated for 2025: Build a blockchain and cryptocurrency. Discover the engineering ideas behind Bitcoin and Ethereum!
Strong on every signal. Buy it during a Udemy sale rather than at list price. Last updated 12 months ago.
Score breakdown
| Adjusted rating (4.75; raw 4.8 from 3,614 reviews) | 48 / 50 |
| Review volume (social proof) | 18 / 25 |
| Freshness (last updated Oct 2025) | 18 / 25 |
| Total | 83 / 100 |
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How it compares in Cryptocurrency
Ranks #1 of 10 popular Cryptocurrency courses we track by score. Its rating of 4.8 is above the Cryptocurrency median of 4.5.
When to buy
Udemy runs storewide sales frequently and list prices are rarely what buyers pay, so the usual advice is to wait for a sale price instead of paying list price. Prices differ by country and account, so we do not show them; check the current price on Udemy.
Tracked history
| Date | Rating | Reviews | Video |
|---|---|---|---|
| 2026-10-10 | 4.8 | 3,614 | 13h 59m |
Tracking since 2026-10-10. Snapshots are taken every few days.