Crypto received for your work is income at its US-dollar value when it arrives — and that same value is what it cost you, for when you sell. Write down the value at the time it landed, and where you read it.
Selling, swapping or spending crypto is a sale. Without naming the units you sold, they are the earliest ones you got into that wallet. Held more than a year — counting from the day after it arrived — the gain is long-term.