With Bitcoin, it is better and more accurate if you use words like growth, not pump and dump. Bitcoin price grows gradually with time, but the growth is very good and solid. You can say Bitcoin has a long sustainable growth in its value, price and trading volume. Altcoins can have pumps but their prices, trading volumes are not sustainable.
I can't agree more with your POV that growth is more relatable to BTC as you have aforementioned, its more sustainable in the long term and etc. but we should not only see the positive side of an entity, we should also accept the fact that BTC is not free from pump and dump scheme. Although the impact of some D&P schemes is very little but it does exist.
As before the creation of this topic of mine
Is Bitcoin truly free of Pump and Dump Schemes? I also thought BTC is free of P&D but when I got valuable answer from OGz I understand that P&D is possible in BTC but the impact of such immoral technique is so little. So considering the fact we can say that positive side is big enough that the bad side of P&D is negligible.