That's some massive profit for 1 bet!
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I didn't check the logs but are you guys sure he only made 1 bet and just stopped betting. Or did he do various bets of different sizes and finally got lucky on that win? If so its crazy and I agree with you that he might of just did a fat finger bet where he accidentally wanted to put 49.5 in the "Win Chance" instead he got confused and put it into the "Payout" option.
Since its a 49.5x chance with the house edge he only has a 2% chance of winning, so its indeed lucky but also not that unbelievable. You can probably hit even 99x chance without too much effort, even if you do only 1 bet.
And I agree with the above poster. $1K is really nothing to most rich people. Honestly there are some upper middle class people that probably don't mind losing $1K a week at the casino, and if someone is an early bitcoin adopter then $1K is definately not that much money.