I agree that $4000 is kind of high, but mainly because it's hard to read prices when something is like 0.0004 btc.
Many people can't do math at all. Try teaching them 1x10^-4 or other notation and it's going to hurt adoption.
Actually, 4000$ per BTC is not too much compared to the max price predicted to be hit with 100K$ each. I ever that BTC reaches that max price, I believe that Satoshi will the first person that owns Thrillion of $. But I wonder how he can cash out that money while many eyes are locked on his BTC addy.
