What do YOU think? If BTC is to be a serious "store of value," do we have to be willing to let go of the idea that the price will rise 1000% in a year?

I think... that neither the one nor the other but the opposite. };)

However, I miss those days when you still could send Satoshis and BTCs around with 0.000001 fees from wallet to wallet. On a truly peer2peer blockchain as if you were sending a tip to your pals or something, so they could complete to buy a cup of coffee or a good glass of beer. :)