It would certainly bring tithing into an interesting focus: since bitcoin, for example, isn't owned by any single [government] entity, and any increase can only

It would certainly bring tithing into an interesting focus: since bitcoin, for example, isn't owned by any single [government] entity, and any increase can only be realized by spending it, should you tithe 10% of your bitcoin to your church? If not, how much should be (presuming you believe the 'tithe' is still binding on Christians today as it was for the Jews of the Old Covenant)? This discussion could probably also extend to investment portfolios - have you actually "increased" when the value of your investments go up? Or do you only consider any "increase" when it is realized from the virtual to the real?