Earlier quoted context omitted.
If contracts are written and priced in BTC, then it will behave like a commodity. Since supply is limited, it's value will fluctuate based on demand (e.g. the need to acquire bitcoin to satisfy the contract). I'm not saying this is actually happening, but when/if it does, it will work no differently than other currencies.
Why would anyone choose to do that without some huge advantage to make up for the risks? The only reason seems to be ideological commitment and that doesn’t seem like an especially large market.
I'm not a fan of BTC or cryptocurrency, but I think there is definitely a case that nefarious use could bootstrap it into a real asset.