It takes about $1.33m of new fiat money coming into the bitcoin economy to buy up the total bitcoin supply increase of about 3600 BTC per day.
Interesting insight. Does this money come from new adopters ?
This money needs to come from the overall market as a whole, however the figure is incorrect.
There is 3.6k~ additional BTC that is mined every day, however all of this is not sold. For example anyone who has purchased a cloud mining contract will likely not sell their newly mined bitcoin, also many people will probably not sell their bitcoin above what it costs to cover their electric costs
If we've got 3.6K surplus each day, any hoarding will be sold later. It doesn't make any difference if they are sold right away or hoarded. It's an average number. If all surplus is hoarded today, we need twice demand tomorrow.