As much as I know about Bitcoin I would have never gotten that answer.
For the amount of spaces they had I would have guessed MONEY
If you got a few of the words crossing it, then it would probably jump out at you. If you did put in MONEY, then it would be ovious that was wrong as soon as you tried to do any of the crossing words. You probably would not need to know much about bitcoins to get the crossword right. I wonder how many people wikipediaed "bitcoins" while or after doing this crossword puzzle?