Judging from your replies, reaching BTC supply will really tend to take for a century or maybe not will likely reach its upper limit. But, since we can not guarantee if Bitcoin will still be the top crypto in that given year, maybe there will be another superior coin that will emerge in replace for BTC.
Moreover, in 19million BTC existing right now, is there some portion of it that is burned? it was reported then this so called "lost coins" when owners that holds BTC in there wallet forget its private key, can we assume that the BTC is burned and will likely lessen BTC circulating supply?