Curiously, there's an exploit to get tons of gold coins really quickly if you have a Magic-specced Lona (or otherwise has an extremely high wisdom stat). It looks like the sell price of Dry Goods is based on the combined cost of two plant-based raw food + 1 wooden log, so with the highest possible wisdom (which increases the amount of trade points you get for selling things), it caps out around 290p (cost of 2 apples and a log is 300p).
BUT, when you cook Dry Goods, you only need to spend 1 log for the entire batch, regardless of how much you're cooking at once. So if you make, for example, 10 dry goods, you could buy 20 apples (2000p) and 1 log (100p), and sell the resulting 10 dry goods for 2900p, netting a 800p profit.
This is, in theory, viable so long as Lona's wisdom stat is above the threshold where the sell price of Dry Goods is greater than 200p, though obviously the higher it is, the better the returns, and if the sell price is only marginally higher than 200p, there's a minimum threshold of capital you have to start with before you can yield returns. For example, if the sell price is only 201p, then you need to be making 100 dry goods per batch (200 apples + 1 log for 20100p) just to break even.
Then, TP increases are exponential up until you hit 1000 dry goods per batch (because items don't stack above 1000, so any extra created will be lost), at which point they flatten out; but with a good wisdom score, you're still making the equivalent of several gold coins per batch.
If you have a rebirth save with at least 50 trait points to spare, that's high enough to hit the threshold (I'm not sure the exact threshold, I think it's around 40 points of Wisdom or so?), and you can supplement it by wearing Glasses and a magic staff to help further.
So if 20 gold coins is going to net us extra trait points, you can just have a save where you cheese with as much wisdom as possible, get all the gold coins, stash them in the bank, and then withdraw continuously to rebirth until you have as many traits as you want.
