People who are buying/holding now - what's the long term plan? Expect even more demand... until? Or is there not "until" and you expect it to go up indefinitely?
If BTC held at these levels for the next 20 years, I wouldn't mind. As long as it holds it own against inflation, it's a pretty nice store of wealth.
If it goes another 10x, I won't mind either, obviously. But I really don't need it to: it's got other advantages.
I still see a lot of growth potential, and I believe the current market cap is overstated. Many many coins are permanently lost, my bet is that the true market cap is significantly under $1T.