Sell the pickaxe and quit.
No matter how fun the game is, if it is repeated over and over, players will get tired of it and gradually leave.
Either continue to launch new plots, new gameplay, and new tasks to let players experience freshness and excitement, so that they can keep them;
Or do some pvp, let players enter pk, and if they win pk, they can get some income, so they can also keep them.
I think the second one is easier. If the second one adds some fresh plots and gameplay, it will be invincible.