Research archive
Each report keeps a snapshot date, visible limitations, source datasets, and a stable citation so later updates do not silently rewrite the historical record.
A reproducible snapshot of HowToBuyBTC's country-access coverage, recorded exchange base fees, wallet capabilities, U.S. spot Bitcoin ETP fees, and common purchase-method trade-offs.
100
Countries
5
Exchanges
8
Wallets
5
ETPs
The report links to the exchange, country, wallet, and ETP CSV files used to calculate its summary.
Future editions should receive a new URL and version rather than replacing old measurements without a record.