That's correct about natural and organic growth, even though your chart only shows a very short and recent period (the past couple of days).

Natural/organic growth is not captured in a weekend snapshot of one exchange (even though the pattern may be similar on other exchanges), so consider that if you are truly attempting to understand bitcoin and where we are at, you may also want to zoom out a little bit, and also consider larger contextual facts, including the fact that bitcoin's price has been suppressed for about 2 years while development and investment in the bitcoin space and adoption continued.

It's called a networking effect, and there may be some fits and starts regarding price discovery and difficulties (especially over shorter periods of time) accepting that BTC prices are real likely and inclined to going up in the current times.. but the upwards price momentum and upward price pressures remain upwardly based largely on ongoing bitcoin growth.