Sorry for clickbaity title, obviously there will only be 21M BTC.
But with more banks, institutions, and CEXs trying to custody the BTC and creating ETFs, options, and perhaps other derivatives in the future, how can we be sure there won't be an "infinite" supply of these synthetic "shares" of BTC?
I don't think all these will affect the total number of bitcoin supply by then, after the whole 21m bitcoin has been mined, i don't also think this is something we may have to worry about, because the idea behind this is to find a means to how people can stop the incidence of inflation over the market in general using the bitcoin approach after being developed, once there is a finite supply, it will be well sustainable because what we already have has their number and everyone can by then try to sell at the rate they which to, this is part of the reason inflation and corruption cannot manifest in crypto and bitcoin network in particular, because such has been programmed with the maximum supply it had.