$500 could be a good target for the end of May. We do not want the price to rise too fast, 10% a month is fine.
Even a growth of 10% is being considered fast growth. 10% per month is an increase of $45 this month, $49.5 next month, $54.45 the month after that, etc. Exactly 1 year from now the price will be $1412. This growth will be nice, but it's way too fast.