Thanks for the comment. This is my mistake, I forgot to indicate that there are several points on the map from which monsters come. These at these points there is always a group of monsters to guard. Withdraw money from them until you are attacked. I thought it would be obvious, but it seems not, since there are comments, a lot of time between attacks is given SPECIFICALLY so that you can finish off the remnants of enemies and you have time left to grind money.
