You must factor in that some of the larger BTC Whales are XMR Whales too.
And for those who are not, the hour is getting late. Soon it will not be possible to become a Monero whale. The club doors are already beginning to swing shut.
Whats a whale to aminorex? In the long term not just today.
If you want to enter or leave the liquidity pool with more than 5% of the daily churn, you're going to make a whale-sized wave of one sort or another. In BTC today that is ~10k. So, in the 2-3 year span beyond which I do not like to make quantitative predictions, that would seem a good benchmark for the Monero whale. I don't think XMRBTC parity will happen by then, but close-ish, maybe half. And the crypto market volume will be roughly evenly divided.
Who might reasonably want to move $5mm in a single day? Someone buying a nice retirement villa, or investing in private equity -- or a company funding off-shore operations or making a capital equipment purchase. Probably no less than 20mm usd net worth...more like 100mm.