Your maths seem to be off.
40k would give you 16 Waves if you sold your iQCash at 0.0004 Waves Per.
200 a day is certainly doable making you 6000 iQCash or 2.4 Waves sold at 0.0004 Waves per
500 comes to 15000 per month sold for 6 Waves at 0.0004 Waves per.
Not sure where you are getting 40k a month. You would need to earn 1334 iQcash per day to hit the 40k mark in 30 days.
Plus you should consider keeping some of the iQcash and not just sell it all off. You don’t want to be left without any when the next stage starts with the possibility of a value increase.