Bitcoin is already outdated technology, that is being used as an object for speculation, instead buy the coins I recommend:
EOS (Long term)
Steem (Now)
Bitshares (Now)
Bitconnect (short term)
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EOS is my next endeavor right now. I see this one really becoming a force in 2018.
Yes, Bitcoin is outdated. And I also think EOS will be next big player in 2018.
It was also outdated a month ago, but speculators don't seem to care.