If the coin is an Ethereum token, then to receive the tokens after the crowdsale, you'd need an Ethereum wallet address. In the case of the BannerCoin ICO (bannercoin.com) You can participate before getting an Ethereum address and payment options other than Ethereum are are accepted. Before you can receive the BCOIN tokens, you'd need to establish an Ethereum address, but it can be done after the crowdsale.