The difference here is that bitcoin gets everyone's trust in the crypto space and Pi gets only criticism with the negative of the community.
I know many channels and communities discussing Pi, indeed I have not seen an environment that lacks knowledge but loves to exaggerate the truth, they only talk about dream profits without really knowing about the nature of the Pi feature (or maybe nothing to say), I remember having downloaded the Pi app on my phone before and I asked a lot of questions when I could still exploit it without an internet connection .