I would wait for the airdrop then sell next and buy ignis immediately after the airdrop block passes..
The problem is I can now buy 1 IGNIS for 1,05 NXT
at least until 21st Oct.
After that 1,45 NXT and next who knows...
You have 21000 nxt, if you wait the airdrop you will receive 10500 ignis for free. I think it's more profitable to wait for the airdrop then get in the action after, if you want to buy some more. After the airdrop some people will sell their received ignis so that will keep the price relatively stable.