This is an incredibly hard question to answer but a good one to ponder on.

When does one have enough?

Money, possessions, acquaintances, experiences, and so on.

The thought that comes to my mind is what does “more” cost?

Time, relationships, money, joy, anxiety, and so on.

Does the “thing” outweigh the cost?

Those with a longer time preference are likely going to weigh up the cost more because they are thinking about the long term.

-Ben