Who proposed the 'bit gold' digital currency design before Bitcoin? Answer with the surname only.
In what year did the Mannequin Challenge go viral? Answer with the four-digit year only.
In what year did the US president sign an executive order creating a Strategic Bitcoin Reserve? Answer with the four-digit year only.
Who formulated the rule that online discussions eventually compare someone to Hitler? Answer with the surname only.
Rounded down to a whole number, how many grams are in one troy ounce? Answer with the whole number only.
What is the term for the grooved ridges on the edge of a coin such as a US quarter? Answer with the single word only, in lowercase.
The mint mark 'P' stands for Denver. Answer true or false.
In what year did the Space Shuttle Challenger disaster occur? Answer with the four-digit year only.