Your friend Hui is an investor in bitcoin. Indicate whether and how she is subject to Federal income taxation in the following circumstances
a. Earns $1,000 in bitcoin from mining.
b. Purchases $1,000 in bitcoin from another friend.
c. Sells the purchase in part (b) in the market to a third party for $1,400.
d. Spends $1,000 of bitcoin to acquire an asset worth $1,500.
e. Spends $1,000 of bitcoin to acquire an asset worth $750.
f. Holds bitcoin that she bought in February for $1,000. On December 31, the bitcoin is worth $1,200.