I don't think you are going to get many "Amass as many sharp things as you can, disregard quality" posts.
Boils down to personal preference. I know that I have a certain number that once I reach, I like to downsize. Others have thousands and want more.
Depends on stage of life and financial situation as well. Go with your gut on where you want to go with your collection and purchases.
I got into knives pretty enthusiastically a few years back, did tons of research and bought and sold quite a few. Although I missed some that I sold, I don't know that I would change much if I could. Good learning experience, and even with said experience I'd still have a tough time advocating whether to recommend a Shiro or a spidie. (Just an example of general prefrence) I think a lot of people ponder where the sweet spot is in their accumulation, (or lack of) and only they can answer that question.