Am I missing something, looks like you can buy Drp tokens with only Eth, or are other coins allowed? Meaning I have to convert my cash/bitcoins to eth first?
Yeah, indeed. I think you can only buy dcorp tokens with Ethereum and nothing else.
If you have bitcoin you can always exchange it to ethereum with a minimal spread as ethereum is quite a large altcoin on sites such as but not included to poloniex(not recommended for now), bittrex, shapehsift if you are willing to sacrifice some ethereum for convenience.
Good luck, hope you get in there early so you don't miss out!