Given Disney's business model and how they generally seem to operate, they're more likely to try coming up with their own crypto if they can't buy one out.

Anything they can't own, they try to compete with. It's a bit predatory if I'm honest. Not what would traditionally come to mind when you evoke thoughts of what Disney represents.
If they want to make their own cryptocurrencytime is now.
But I believe they already have one. Dragon chain, right?
https://en.m.wikipedia.org/wiki/DragonchainDragonchain is a blockchain platform for enterprises. It was originally developed at The Walt Disney Company[1][2] in Seattle in 2014 and then open-sourced in 2016. Despite extensive speculation,[3][4][5][6][7] there is absolutely no relationship between Disney and Dragonchain.
If they own dragonchain or not, they are very good in everything they do.
Just compare marvel movies with DC's... Their parks with the competition..
If they make their own cryptocurrency it will be as good aa libra ir any other, probably even better.