Are you in the USA? I seem to recall you were elsewhere. Here, we have a lot of legal limits on gambling, as the government prefers to be the only one taking your money, hahaha (kidding) (mostly). We can trade stock, or bet on horse racing. Anything other than that, can only be done in legally-approved casinos. Which are definitely not the place to gamble for a psychic. If they even have the slightest whiff you're consistently good at it for any reason, facial recognition in a national database system will make you lucky not to get tossed from any casino you entered anywhere in the country ever again. And things like betting on sports is not a thing. We can only do it online through international companies and it's illegal for us, but not for them, so not a good thing to get caught doing. Maybe this differs by state... not sure.
So given the output $ potential, it always seemed to me that gambling with ARV might be most lucratively done on the horses. And I seem to recall there is something unusual with that kind of gambling, like you can make a lot or even more by having your horse 'place' as opposed to win, or bet on it doing either, that for someone who knows the system might provide larger options. Market exchanges (e.g. Silver) always seemed like they'd be pulling teeth to me, since a "multiplier" is really only quantity of bet (which is also of course a lot to lose), whereas things like horse racing can be multiple "times" odds.
Also, there might be more "differences between" different horses/names/colors/jockeys than there is between "silver" merely shifting price slightly. Well, I don't do ARV, that's just my thoughts. I would really love for someone, anyone, to make a ton of money at this. Greg K never finished his trial. It might be that cognitive dissonance got him (that's usually what takes down viewers' efforts and they walk away), but he did go on to win at least two world records, so it's safe to say he was busy doing something more constructive.
I have got to get some better smilie options into this software...