Peter, I think pretty much everyone who's looked at that has concluded that because Notice 2014-21 says that crypto is "property" and not an actual 'coin," and because it is intangible, it's safe to hold in, e.g., an IRA, without violating 408(m) as currently written. Cold wallet storage raises a custody issue, however, that you have to be careful in handling, e.g. by holding through an exchange rather than directly in your wallet. There is a whole business niche catering to crypto IRAs. I have found that the best place to find info on it is Youtube, but of course it's not all good.
Could.
They might, but at least until recently there have been some powerful, bipartisan folks in the Senate who are trying to position their various localities as "crypto valley." Crypto has some good lobbyists.