Nah, perhaps this is just politics, maybe he was really a pro Trump and that's why he blurted this statement in public. Nothing to take serious though, maybe he meant different and didn't gamble that involved money. But since Joe Biden has won already, and just like any other state heads, he is oblige to accept the fact that he will be working on a new US sitting President and there could be changes in the policies and trade relationships.
I did not bet on this US Election, but if ever I was, for sure I'm going to lose because I'm going to bet on Trump winning the re-election.

Politicians and statemen should not take this issue seriously after the election, politicians should make peace with each other, Biden seems to be a very nice guy he will understand the situation and his administration will try to convince doubters that his administration is better than the Trump administration, I hope the United States and Hungary will work closely for the betterment of their citizen.