The data centers have already been financed, they’re not going to stop halfway through because they’ve run out of money. Whether or not they’ll make money on completion is a different story, but that’s 2-3 years away at least. Then you might see RAM prices drop, but not before.
I would not be so sure - for example Oracle is already struggling to finance its datacenter commitments:
https://www.tomshardware.com/tech-industry/shareholders-sue-...
Financed means they have a promise to get the money, it doesn't mean they have the money.