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Steem is likely to die, suddenly and without warning, continued writing increases how much you can get, if you dump, for tron stealing your history.
Hive is likely to persist, I think your history is safe there.

As long as the price holds, I wouldn't bet against either.

And, it's magic internet money that fedbook, twitter, Instagram, medium, and minds all keep for themselves.
Better to blog on steem, than fedbook, IMO.