Earns $$1,000$ in bluecoin from mining.

Purchases $$1,000$ in bluecoin from another friend.

Sells the purchase in part $($b$)$ in the market to a third party for $$1,400.$

Spends $$1,000$ of bluecoin to acquire an asset worth $$1,500.$

Spends $$1,000$ of bluecoin to acquire an asset worth $$750.$

Holds bluecoin that she bought in February for $$1,000.$ On December $31,$ the bluecoin is worth $$1,200.$