So there are 21 million total because that is how it was coded. Will it be possible to increase the supply or even make it infinite if someone was able to crack the code?
the old question and the answer remain the same, that is, it never will...
Bitcoin supply has been fixed and will not be able to increase, this is the reason why there are many fork coins that are useful to maintain price stability. cryptography is something that cannot be changed again when it makes cmiiw.