The only time trading away BTC, other than a mistaken sale of one when caught in a spike in 2015, was for enough STEEM to power up to Minnow level and later Dolphin level when things hit 0.00008275 BTC/STEEM last month.
My thoughts were exactly as you suggested; the BTC is only gathering dust while STEEM is vibrant.
The jury may still out about investability of DPOS tokens; but we can all agree it's entertaining in the front lines of blockchain technology. 😎
Perhaps it depends how one sees it? If demand grows, price will increase somewhat and even though there is still inflation of steem, it has an access draw on the pool. It is going to get interesting if this does all take off though :)
It seems almost too early to be sure of any existing tokens. HODLing until the market decides. 😎