OTC is eitherway beneficial, OTC desks deal with a large network of mining operations and exchanges in order to serve as market makers and provide liquidity for trades. The most important thing and what will define your trades direction is your knowledge about the field, you need to know a lot about trading so only you could tell wheteher your trade will be successful or not. Lacking of knowledge about the business might bring you unfortunate downfalls for other correctors might try to outsmart you. For large investors OTC is better since they can avoid exchange scamming, and its more preferred by whale investors.