Don't worry, when bitcoin price reaches $1K+, there will be lots of users using bitcoin. Currently bitcoin just worth too little that if you spend your precious coin you will have little left (suppose most of the users have 1-100 coin), but if one bitcoin worth a lot, then lots of people will start to spend them
If users can overcome the idea of having fractions of a coin for their hard earned money. Or maybe they will forget what its worth and perceive fractions of a coin as being trivial.