I think BTS is far below the market cap it could be. Once people realize that SteemDollars are maintained by the same principle as BTS assets. But really this rise has nothing to do with Steem's rise. Steem goes up, BTS goes up (awareness); steem goes down, BTS goes up (escape to safe-haven).
But really... I think Steem could get bigger than Bitcoin. It's just such a brilliant distribution model.