Just keep in mind that while the output of a PRNG may appear random, it's still deterministic and can be reproduced given the same initial seed value. If you need a truly unpredictable and non-deterministic source of randomness, you might want to consider using hardware random number generators (HRNGs) that generate random numbers based on physical phenomena like thermal noise or radioactive decay.
Nothing that is governed by physical laws can be random. The first video games (Atari) used the number of seconds since boot as a seed. We may view radioactive decay as random, but we don't understand the laws behind it's decay. Eventually technology will remove the randomness.
Here is a tip that will save you years of pondering, reduce "eventually" to a much shorter time frame.
Almost any PRNG has a progression that is derived from something like "the sums of segments in the sequence".
So, for example, the NSA has programs that quickly determine how many numbers in a sequence of pseudorandom numbers need to be combined to form a 'visible' pattern.
With Bitcoin it might be..."each 50 consecutive private keys when combined/summed form a pattern that corresponds to their 50 respective public keys summed.
Radioactive decay is a real mystery that is hidden by science.
PKC "randomness" is hidden only by the psychological trickery of convincing people that it is hidden.
The gangs that control PK cryptography have a lucrative scam that has produced literally trillions of dollars a year in benefits so they go to great lengths to maintain control of the 'secret'.
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edit to add an obvious point/
In the example above the sequence could then be divided into 50 "curves" each being a meaningful sequence...which could then be decrypted easily, just determine on which of the 50 curves a specific key falls/
...and a further psychological point.
Many people have figured out the flaws in various systems like PKC, and similar things. The DPR trial smashed one of the government's top honeypots, for example, and the 'freeross' website exposed details that many agencies desperately wanted to keep secret.
Was their motive to fight crime? To make a safer world?
Ask yourself, honestly.
When most people figure out these scams they contort their world in a way that allows them to serve, and side with, power.
A group of people can always find a rationale to justify anything "Yes, we had to do "x", but it is part of a bigger picture..."
Gangsters always find a way to justify their crimes, as long as they have the power to convince.