As we all know BITCOIN mining will stop once the 21 million mark is reached. According to the information we have 19 millions coins were mined and now circulating. The remaining balance is about 2 millions to be mined. Why it is not possible to mine the remaining BITCOINS before 2140 when the 19 millions mined in just over 10 years?
I don't think that you need to wait till 2140, most likely in the next 3-4 block halvings, "almost all" bitcoin are going to be mined or at least 99% of it. And that 1% could take centuries to be mined.
So in this case, it might be difficult to get bitcoin decades from now. Supply are dwindling, but that 21 million might not be reach technically.