No, there’s no reason to want to go OTC for just 20k and most desks won’t will deal with you for that amount. That isn’t even half a BTC at current prices, ever

No, there’s no reason to want to go OTC for just 20k and most desks won’t will deal with you for that amount. That isn’t even half a BTC at current prices, every major exchange has the market depth to support that.