providing custody and administration of crypto-assets on behalf of clientsexchange of crypto-assets for fundsexchange of crypto-assets for other crypto-assetsexecution of orders for crypto-assets on behalf of clientsplacing of crypto-assetsreception and transmission of orders for crypto-assets on behalf of clientsproviding advice on crypto-assetsproviding portfolio management on crypto-assetsproviding transfer services for crypto-assets on behalf of clients