I'd take the 55,000 STEEM.

Larger upside potential, while I see very little upside on BTC (personal opinion).
STEEM is less volatile. More "sound." BTC will become much too expensive on the fees and far too volatile.
STEEM gives me MUCH MORE OPTIONS (power up, create income in voting, delegate, support causes), while as BTC is just another token. STEEM tokens can MEAN so much more than just a statement of value.