It depicts a heavily muscled, weathered, and cyborg-enhanced version of Saylor sitting in a post-apocalyptic room with exposed bricks and broken windows.
The futuristic Saylor is adorned in rusted metal shoulder armor and a headpiece. There is a glass containment unit built into his abdomen. A preserved version of Saylor's face is seen floating inside the purple liquid of the container.
His dirt-covered "Gateway 2000" desktop computer is surrounded by scurrying rats and a massive mountain of physical coins. A green-text monitor displays the culmination of his life's work: TRANSACTION IN PROGRESS... PURCHASING FINAL BITCOIN... DONE. REMAINING SUPPLY: 0.00000000 $BTC. SATOSHI CONFIRMED.
Bitcoin has a hard-capped maximum supply of 21 million coins, and the block reward halves every four years. The final fraction of a Bitcoin is not projected to be mined until roughly the year 2140.
Beeple's inspiration for the bizarre piece likely stems from a recent CNBC interview where Saylor explicitly stated that the company will keep buying $BTC until 2140. "Our company will probably buy all of the Bitcoin that gets produced by the miners between here and the year 2140. Then there's no more Bitcoin."