The best way is to invest a little amount of money in game and buy a grab pet. Just pick up everything and sell it in town. Try to find a bot that isn't picking up his gold and go grind close to him with your pet

A nice way is by reselling elixirs. They are often lower priced in jangan and constantinople than in hotan. You buy them cheap and sell them high price.
If you are in a guild, do 5* trades with high level hunters to bodyguard you.