Re-purposing crypto datapoints for other purposes is one of the capital sins of data security.

There is no logical reason to do what you are suggesting. And whether or not a specific vulnerability for what you are suggesting is immediately available, it's still a bad idea.

Just use a random value, which is the known, vetted, accepted approach. Otherwise you stray into Dave territory.

Re-purposing crypto datapoints for other purposes is one of the capital sins of data security.

There is no logical reason to do what you are suggesting. And whether or not a specific vulnerability for what you are suggesting is immediately available, it's still a bad idea.

Just use a random value, which is the known, vetted, accepted approach. Otherwise you stray into Dave territory.