I'm curious as to which large BTC holders are invested in to XMR other than the ones we know of from this thread?
None that I know of. But I'm sure there's a few. I guess the only way to confirm this would be a signed message followed by a specific XMR transaction. Otherwise we will just have to take the mans word.
OP has predicted a 1000x fiat-denominated gain in Monero (equates to a ~35 billion dollar market cap after all supply is minted) here, so it wouldn't surprise me that quite a few people are attracted and have thrown a few btc down, especially after the recent price-movements with BTC.