If you write a negative book about a collection of topics and make it diverse enough not to have to go in detail you can tailor it such that wikipedia becomes the perfect promotion vehicle. It has to be negative since removing positive material is much easier than either writing it or removing negative material. (There is often some sub-human narcissist volunteer willing to preserve negativity.)

Sober neutral voices get nothing done. You have to be extreamly biased

It's literally never not amazing to have crypto fans claim not being a crypto fan is a conflict of interest, BUT owning the crypto they're promoting isn't a COI.