For tax purposes, Sydney needs to report all actions except the original purchase of cryptocurrency. Specifically, the IRS requires taxpayers to report:
- Converting cryptocurrency to dollars (this is a taxable event).
- Selling cryptocurrency (this is also a taxable event).
- Exchanging Bitcoin for Ethereum (this is a taxable event, even if there is no cash involved).
- Using cryptocurrency to buy a plane ticket (this is considered a sale for tax purposes and may also be a taxable event).
The original purchase of cryptocurrency does not need to be reported since it does not trigger a taxable event until Sydney sells or exchanges her cryptocurrency. Therefore, the correct answer is that all actions except the original purchase of cryptocurrency need to be reported to the IRS.