You will need Ape Coin to buy land and to execute some other functions in Otherside, but to just get into Otherside, you will need to have a BAYC or a compatible NFT, which includes but is not limited to Mutant Apes, Crypto Punks, World of Women and Cool Cats. Regardless if you are in Otherside or not, as a holder of the Apecoin, you will have voting rights in the ApeDAO and can have a say in the direction of the community.