I love using the economy to my advantage, its so easy to use its just requires patience.
1.Just amass alot of goods that are in demand (or probably will be I.e.2nd or 3rd tier scroll materials) early in the game.
2. Wait for prices to slowly increase, due to demand increases, rarity, inflation, scammers etc...
3. Sell
I usually do this whenever i decide to take a long break from whatever game.
You can't call me a greedy jerk if i just wait on "investments" can you?
scammers and economy changes are inevitable, especially in real life. Just try to do what you can really and make some money on it later. A rant like this will not stop people from being greedy bastards. Inflation can be a bitch, Its best we all find ways ways to deal with a constantly changing economy some way or another