Re: Theoretically there will be exactly no bitcoins in the future.
Or, if 100% of all bitcoins were lost every day for the next 100 years, the number of bitcoins would still remain above 0.
I hope we can all agree that there isn't going to be a day when EVERY user of bitcoin is going to simultaneously permanently loose access to all their private keys. However, if 100$ of all bitcoins WERE lost on a single day, then the number would be 0. That's pretty much what 100% means.
But then more would be generated in the next block.