why not work out roughly what the shares could be worth rather...

why not work out roughly what the shares could be worth rather than guessing at silly numbers like a $1 or 25% higher. If the results are even close to what I have read on this forum, then the broker estimates of $1.42 are so low it laughable.
5% of an $8B market at 15% royalty = 38c per share. P/E 10= $3.8...but 5% is way too low for a drug with no side effects...