It's the civil libertarians, criminals, and tech aficionados that hold Bitcoins in unhosted wallets. When there's on-chain activity for these groups, though, it's usually a transaction rather than a trade. They hold Bitcoin for the activities they can do with it, not for any hope of the price rising.
Whether the bitcoin holder sees it as a loss of value is beside the point, since purchasing in bitcoin is hard still.
It's like using Euros in the US. Some folks accept them, but generally dollars are preferred.
I’ll give you an example, I bought at BTC $36k last month and just withdrew it from exchange after all the fiat cleared in from the legacy banking channel today. It hit the chain when BTC was $42k, so these jokers would think the cost was 42. You can’t get an accurate picture from on chain data alone.
A better analogy would be like looking at clearing house data, and examining the net number of shares bought or sold at each broker, to determine how many individual investors are in the red. Even though the price changed throughout the day and you're only looking at the price at settlement time. And the net doesn't tell you anything about how many investors actually traded.
If i'm understanding the methodology here, the assertion that it translates to investors is really flawed. You can't assume:
- a transaction appearing on chain constitutes a buy
- that the transaction represents 1 investor
- that 1 investor = 1 address