XBT is an alternative ticker symbol for Bitcoin, used alongside the more common BTC. It follows the ISO 4217 international currency code standard, where the "X" prefix denotes currencies not tied to any specific country.
Why XBT Exists
The ISO 4217 standard reserves two-letter country codes (e.g., "US" in USD, "EU" in EUR) for national currencies. Since Bitcoin is not issued by any country, the "X" prefix is used, similar to gold (XAU) and silver (XAG). "BT" represents Bitcoin.
Usage
XBT is primarily used by exchanges and financial platforms that follow strict ISO standards, including some derivatives exchanges and financial institutions. Most retail-focused platforms use BTC.
BTC vs XBT
Both refer to exactly the same asset โ Bitcoin. The difference is purely a matter of naming convention. BTC is overwhelmingly more common in everyday use, while XBT is preferred in institutional and standards-compliant contexts.