I had a firm belief in BTC that it could not be used in the Pumps and Dumps Scheme because of its scarcity (limited supply, high demand) and decentralization. I posted a topic about
Don’t Fall Prey to these Market Sentiments and Save your Bitcoin in which i covered 4 major market sentiments. One of them was the Pumps and Dumps Scheme, but "
this market sentiment has no impact on BTC price". That's what i learned in that topic by reading members' replies.
I think you are mixing different things together.
Pump and dump is a market manipulation practice. Even is highly regulated markets, such as the stock market, there are pump and dump schemes.
Bitcoin scarcity is totally unrelated to market manipulation. Scarcity makes it more valuable, but what would make it resilient to manipulation would be regulations, what bitcoin lacks.
Who can forget Elon Musk playing around, saying he was going to use bitcoin as a payment method in tesla, then he suddenly changed his mind? This is market manipulation