Yifu alluded to that address having nothing to do with him...although he didn't deny it either;
I was waiting for that. I bought chips through a group buy, and all the payments from that group buy went to this address. Chip orders cost 782BTC, and almost all of the transactions to that address were for that exact amount or very close. People were wondering why Yifu hadn't spent any of the 72K BTC yet, and I think what he was alluding to is that either TSMC or some other entity was interested in keeping the funds as BTC and paying for the fab work using currency from some other source. My point was- that address is most definitely for chip orders, and there are almost 100 x 10,000 chip orders there.
Another possibility: In his talk he mentioned that he was selling large amounts of BTC privately in order to pay for fabrication. It's possible that 75k btc address belongs to some rich person he was selling coins too.
But that said, it really does look like all of those transactions were for chip orders, as most of them seem to be close to even multiples of 780BTC. For example check out
17Tfh8SE71MbvQ5vZtXPQA8a4YM8NPv3bf Which did nothing except take in 15.6k
BTC, and then send it to the
1FGAftz... address.
That's slightly more then the cost of 20x boxes of chips.
I think the most likely scenario is that large orders are being prioritized over small ones.