Why would they hold a rally? There was a contest, Trump won, he's doing what he said he was going to do. I would assume they're all sitting at home watching events unfold.
That said, I'd be willing to bet a quite a few of them are thinking he's going to far to fast.
I'm under the impression many people voted for him based on his claims that he would combat high consumer prices. All indications seem to be that he will in fact be doing the opposite.
“Starting on day one, we will end inflation and make America affordable again, to bring down the prices of all goods.” Trump Rally in Bozeman, MT, (August 9, 2024).
“Under my administration, we will be slashing energy and electricity prices by half within 12 months, at a maximum 18 months”
“Prices will come down. You just watch: They’ll come down, and they’ll come down fast, not only with insurance, with everything.” Trump Rally in North Carolina, (August 14, 2024).
“Starting the day I take the oath of office, I will rapidly drive prices down and we will make America affordable again. We’re going to make it affordable again.”
“We’re going to get your energy prices down. We’re going to get your energy prices down by 50%.” Speaking at Wilkes-Barre, Pennsylvania, (August 17, 2024).
“Energy is going to bring us back. That means we’re going down and getting gasoline below $2 a gallon, bring down the price of everything from electricity rates to groceries, airfares, and housing costs.”
“We will eliminate regulations that drive up housing costs with the goal of cutting the cost of a new home in half. We think we can do that.” Speaking at Economic Club Of New York, (September 5, 2024).
"While working Americans catch up, we’re going to put a temporary cap on credit card interest rates. We can’t let them make 25 and 30%.” Speaking in Uniondale, New York, (September 18, 2024).
...and so on.