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bit21 - Bitcoin Wallet
Store Bitcoin. Stay Sovereign. An open-source, self-custody wallet that lets you securely store, send, receive, and manage your Bitcoin.
Updated: 2026-10-28
Research from the blog
All →- 2026-09-30
Crypto Ads on Telegram in 2026: Who Advertises, How Long They Last and What the Rules Say
What our archive of Telegram sponsored messages shows about crypto advertising: how big the niche is, that almost all top advertisers are Telegram accounts and bots rather than websites, how short their lifespans are, what Telegram's ad policy says about crypto, and how to research a competitor yourself.
- 2026-07-10
Backpack vs Phantom on Telegram Ads: Exchange-Wallet vs Self-Custody Leader in 2026
A head-to-head of how Backpack and Phantom advertise on Telegram — the Solana-rooted exchange-and-wallet versus the leading self-custody wallet, their creative and targeting differences, and what the Telegram Ads Spy archive reveals.
- 2026-07-10
Belgium on Telegram Ads: Europe's Strictest Gambling Regime and the Trilingual Split (2026)
How advertisers reach Belgian audiences on Telegram — one of Europe's toughest gambling and ad-restriction regimes pushing operators offshore, a Dutch/French/German language split, and EU-regulated crypto and trading.
- 2026-07-10
Ireland on Telegram Ads: The English-Language EU Bridge and Fintech-Hub Effect (2026)
How advertisers reach Irish audiences on Telegram — an English-speaking EU member inside the UK-Ireland creative pool, a fintech and tech-HQ hub, EU-regulated crypto and forex, and offshore gambling under a tightening licensing regime.