Ive read a couple of articles recently on Steem on inflation and not sure bitcoin will ever become currency because it has no inflation. Small inflation is what keeps people using something as curency as there is always a downward force on the value of the asset so it decentivizes hodling. On the other hand since bitcoin had no inflation it encourages hodling which is the exact opposite of what you want for a currency.

I could be completely wrong, but I can see why Bitcoin will more than likely always be a store of value rather than an every day currency.