I do not think I will buy bitcoin if the price reaches $ 100k, because it is very expensive and I should look for bitcoin through signature campaign. In signature campaigns by getting bitcoin will be very profitable and I will start investing after I get bitcoin.
Those who knew bitcoin as this moment may no longer buy if ever such amount reach, we may think it too high, and just regret decision of no buying it now, but newbies by that time may still get attracted on its price since they will see proofs on old users who earn thru btc investing.