The whole analysis is based on Elliott Wave Analysis:
I believe that we have only just ended the Wave A of Wave (5), heading into a wave B, acting as a corrective move.
Idealy, I would like the price to dip into the 0.5 to 0.618 retracement zone (165-180).
This might take a while, but once this correction is over, I see a very strong move upwords, as a wave C of (5). This should take us to a new ATH anywhere between 400 and 515 (more precise predictions can be made as we approach the mid to end of the wave C).
I would probably wait till the correction is over to buy, 185-180 acting as a buying zone!