Arena chests aren't tradable, opening chests is not a thaaat much of a good way of getting gold.
Since the drop rate of vials is .... and arena comes at a cost, ankhs and pots.
So once I wasted 25 ankhs and a lot of pots on getting 50 chests, opened them, pooof 1 vial,so I won like 80k considering ankhs were 100k.
And it took an entire day, so if i did km3 i'd have got like 500-700k.