Commodity
Any unit you can hold an amount of: a currency (USD, EUR), a stock (AAPL),
or crypto (BTC). A currency is just a commodity that happens to be money.
Surebeans handles them all the same way.
A Posting carries its amount in one commodity. An Account is not locked to a single commodity; it can hold several at once.
2025-02-11 Buy shares
Assets:Brokerage:AAPL 10 AAPL {183.07 USD}
Assets:Cash -1830.70 USD
See Multi-Currency for reporting currency, prices, and how exchange-rate moves affect net worth.