For example, would the question "Does the IRS bitcoin policy double-tax miners?" be considered off-topic and should it be posted instead on money.stackexchange?
It really concerns the Bitcoin niche a lot more than just finance. You'd need to have experience with Bitcoin to know the answer to this question, you wouldn't have to be a financial pro. The people at money.SE wouldn't know the answer to the question unless they know what Bitcoin is or the question explains it well.