Couldn't a central bank hack Saifedean's recent bitcoin-as-money hypothesis?

If number-go-up is the crux holding bitcoin-as-money together, couldn't a central bank just buy bitcoin at a 10% premium from a handful of whales and sell those same bitcoins in the marketplace, suppressing the bitcoin market price? A central bank has infinity dollars, so the only cost to suppressing the bitcoin price would be enriching a few (already rich) bitcoin whales. Given that such price suppression might be essential to keeping the money printer working over the long run, the cost of enriching a few bitcoin whales would be trivial if it allowed fiat operations to continue uninterrupted. Sure, those printed dollars could eventually dissipate to the wider market and inflate prices, but it would probably take a while, and in the meantime, current and potential bitcoiners might lose interest in bitcoin.

Is this not a straightforward hack for a central bank to perform? Or have I missed something?

EDIT: A lot of people have commented that the whales could just buy back the bitcoin and make a profit. If there were no conditions on the trade, this would be true, but of course, there would be conditions on getting above-market profitability. Imagine, for example, a whale being offered 40% above market fiat deliverable after one year under an NDA. The market would not be able to detect any clear signs of such a trade until after a year. If the central bank wanted to extend the price suppression for another year, they could simply double down on the bet. Yes, this would eventually get expensive, but being a central bank means you get to print money, so "expensive" doesn't mean the same thing as it does for any other person or institution.