Although NEO is a very good and promising coin as it has good dev and team members, it has good technology, supportive community and it is also a potential coin for hold on long term but it cannot surpass bitcoin because bitcoin is the most potential and valuable crypto.
Signs that NEO can surpass bitcoin by the year 2019 has not been seen, of course the thing that must be achieved this year is to enter the top 5 or replace ethereum in the second rank,