It's not likely that
you'll want to report these as "Other Income" on line 21. Capital gains and losses would be treated
differently.
I'll attach a few
TurboTax FAQs below that should help you sort out what you need to do.
What is a capital gain or loss?
https://ttlc.intuit.com/replies/3301738
How do I report earnings or losses
from Bitcoin and other cryptocurrency?
https://ttlc.intuit.com/replies/6468300
How do I report Bitcoin or other
cryptocurrency as a capital gain?
https://ttlc.intuit.com/replies/6468652
