Either that or he is dead which probably means the keys went with him to the grave.
Discussion
Third option: He is dead but left clues. This leads to a National Treasure/Indiana Jones style plot to recover the "Keys of Satoshi".
Either that or he is dead which probably means the keys went with him to the grave.
Third option: He is dead but left clues. This leads to a National Treasure/Indiana Jones style plot to recover the "Keys of Satoshi".