How to purchase tokens by BTC, DASH, LiteCoin, BTC Cash
That is true, it is normal to see ETH is accepted to buy Abyss ICO tokens since it will use ETH network to release tokens, why use bnb? BNB is just a coin distributed by an exchange, which is more similar to a dividend coins.
As far as I know, this project only accept ETH and BNB, so you can not buy the ICO tokens by BTC, dash litecoin and BTC Cash directly. You can conver your coins to ETH or BNB on exchanges such as the Binance.