not really, there is a massive manipulation going on that is done by the miners themselves, if you think that the miner will let all their asic worth nothing you're wrong
it's too damn profitable for them, they will manipulate the market to increase the value
How exactly can miners manipulate the price (drive it up) when they only have bitcoins? The best they could do is to not to dump them on the market too quickly. But that's hardly a manipulation.
To manipulate the price up, they'd need large amounts of fiat money.
I agree with you. Miners cannot manipulate the price up, they could only manipulate the price down by dumping Bitcoin. That's the beauty of the halving: it's not a manipulation. There simply is only half the supply, the price naturally has to raise.