Cover corp should make Hololive Coins. Unique, cute anime girls serve as the value proposition for a crypto asset. The speculative aspect of crypto would fit perfectly with the speculative nature of a vtuber's success - because the talent is a real person and not a pre-written story, nobody knows what's going to happen, so the ones with good eye know who to invest into.
For each girl, a set amount of tokens would be auctioned by Cover over the period of 5 years, starting from a vtuber's debut with initially high supply that gradually dries down over the next 5 years. The market value is naturally determined by how much people appreciate her, and thus how much they want her official token that represents her. The value might change based on the vtuber's performance, drama, speculation and the legacy they leave when they eventually quit.
The credibility of the token is backed by trust in Cover releasing the coins for each girl in a consistent manner. The initial sales of the token doubles as revenue for the vtubers+agency, that people would have given to them as donations anyway, however the prospective value of the token could increase fans' willingness to spend, as well as motivate the vtuber to perform well so that their tokens get higher bids. This system is basically win-win for everyone.
And yes, I would have gone all in for FUWAMOCO COIN from day one, because these girls are going to be legendary.