better to buy a new key for 30€ as loosing a account with a worth of 300-400€Quote:
It's not even possible to send gold from a free account (which I assume he means), if he means a secondary account you would need to buy another GW2 Key, which is not what anyone wants I suppose.
Even if you keep it as low as 50 gold, chances are you will get temp banned. The amount of gold you can send/ receive in a week is a maximum of 500 gold, so you can't even send/receive more than that in a week. Trading gold indirectly (by items for example), avoids this and is safe to do.