I don't know what will happen in the future, but in my personal opinion Bitcoin is currently more than 50% only used for investment or trading. Even though Bitcoin actually has the purpose of being the corpse of digital money, I don't think its use is yet optimal.
I think 50% is just too low, maybe it is high as 70% to 90% since people are usually holding them rather than using them on the daily basis to pay for food or something like that. It is not that all of them wanted to, they have no choice since most of us can't actually use bitcoin directly so they are still stuck on using fiat.