Coins can only be obtained in three ways, either slowly or in large quantities.

1. titanium iron powder, obtained by purchasing or decomposing titanium ore.

2. Buy the damaged necklace directly, take the task and get a coin.

The damaged necklaces are about 200g each, which may not have arrived yet, because there are very few out.

3. Do daily tasks. Change a picture every four days.

So it costs a lot of money to collect titanium ore quickly. There is no other way.