Not a place where one shill their tokens but rather where you can discuss strategies, what factors made your investment work, what did not, etc.
The closest thing we have now regarding this is Trading discussion, but these two things differ a lot.
If you want to a place not for shilling but for discussing investments in tokens, your topic belongs in one of the altcoin boards.
For non-Bitcoin investments there's Off-topic but Serious Discussion and Ivory Tower and often Economics should also fit.
For Bitcoin investments if Trading Discussion doesn't feel like the right board for your specific topic, then Economics, Speculation, or
maybe the top-level Marketplace board or the Securities board would be a better fit.