The correct mathematical play would be to let it ride. But if 42k is a lot of money to you then it is possible you would just take the $ and run as Steve Miller would say.
You could also buy the bet back by hedging if possible and extract the true equity you have from the bet.
I cash out, 48k would fix me for 3 years easily
Hypothetically if you had time and knew someone well capitalized, you could tell them to float you 75k and bet it on the other side and give them 5k for their troubles and walk with around 20k more than 42k.
This would take some trust and coordination though.
I took it to mean the $28 to win 142k is like the 18th leg of a parlay or something like that. So at that point just a straight bet at 50/50.
Yes.