Bitcoin doesn't "store value", it has the value that society assigns it, which is what the parent means when s/he says "BTC is valuable solely through the power of memes". It's not a fiat currency, nor does it have any intrinsic utilitarian value.

Age old argument: money also has no intrinsic utilitarian value.

And yes, btc does store value, it is doing that for me now. I stored some of my value in it and it has held better value than fiat.