[LittlePeter]

It depends over what time period those 21K bitcoins were bought. If they would have been bought within a day, there would absolutely be market impact (bitcoin price would increase by double digit percentages).

The daily trade volume is mostly people passing bitcoin to each other. If a whale like MicroStrategy is actually taking them out of an exchange, things will dry up quickly.

My guess the bitcoins were bought over a period of at least couple weeks, and probably using OTC trades as well.

[throw1234651234]

As far as I understand, the companies in the list (didn't check if OP's company is included) are buying from Grayscale. Grayscale has been buying up BTC and ETH for years, but ramped it up recently (I want to say Q1/Q2, but don't quote me on that).

So these orders are not hitting "the public market", it's coming from Grayscale inventory (not even that, since the companies aren't buying directly and taking custody).

Also, good point on BTC supply being less than the 21 mil cap / whatever was mined already.