I am quite confident that we will see several downturns at least until the end of April.
Put a few orders in at around $400 and you will see them filled within a short period of time. Spend your mind on other things than speculating on the constant ups and downs of the marked, it is not healthy.
You can always buy a little right away if you still haven't, just to get used to the system, but hold of a little on the major buy-in