I'll have to go with 1 BTC.
I'm a low-risk kind of guy though and would rather a $3,000 BTC 5 years from now than $0.00 for my Steem.
Why I chose Bitcoin - Brand recognition. Even if people have never used Bitcoin they still have probably heard of it.
It's been around longer, so the chances of it going to 0 in the next 5 years are less.
Its design makes it a good store of value.
It would be awesome to say I have 1 BTC.
My actions though say I'd go with Steem though as I just sold all my BTC and alts to try and make it to dolphin status before the end of the year.