I've never had ethereum wallet, i've never had invested in ethereum. On first level I chose bitcoin and I dont understand why they dont give me chance to do the same. If I knew that I would have to buy an ethereum, I wouldn't participate in the ico.
I don't think you need to buy any Ethereum. We don't have any AE tokens until the Genesis block.
If you invested with Bitcoin you will get your AE.
Or is this about something else? Let me know and I will try to help.