To beat him you need to win the parlay with odds 25x not something impossible in my opinion
Today I've spread several parlays at least 3 parlays from normal risk to high risk hope one of them shoots the leaderboard.
Since the return on investment is 2495%, the actual bet odds would be 25.95 (since 1x of that is you getting your bet back), but you have the right idea.
Here is the leading bet, for reference (slight difference in odds shown, due to change in currency value from time placed to time resolved):
https://www.betcoin.ag/betslip/X1044MFTF