The time traveller is able to travel backward and forward through time (max forward is 2074) and they can only transport things that can fit in a small backpack.
You can choose when the 3 hours begin but it has to be in 2024 and once it has begun the timer can't be reset or stopped.
They will answer to the best of their ability but imagine this is a random person from 2074.
Well, for money then, definitely have them travel to a time and place with a hyper inflated currency, and then bring it back in time to have tons of money. I think this might technically be a form of arbitrage.
Hmm… assassination would be pretty easy, but idk who