Or POW. Millions of blocks mind by a handful of people in the early days of BTC. Satoshi has 5% minimum of all BTC that we know about
Depends what type of POW you are talking about. A long POW with the right difficulty targeting and with a number of pools on board it is fair. Early adopters are not always there in the long run.
What about for people without mining rigs/ASICS? Or your grandchildren's children?
Exchanges?? Buy it or Earn it.
This can be said for POS/IPO. So why didn't you include POW in your list if there is nothing inherently fair about it? You still need money to buy your ASICS, and your grandkids-kids will have to buy at prices much higher than today (assuming successful) so they don't even have the opportunity to get a substantial cache.
No it cannot. IPO usually distributes a very large, or all of the coins to investors and developers/the "foundation". That is generally always horrible distribution, as there's no way for newcomers to mine coins themselves without having to buy in at inflated prices by the whales that now own the coin.
PoW is indefinitely more fair than an IPO can ever be. In PoW, anyone with a cpu, gpu, or asic can begin mining for their own coins no matter how small the reward is. That simply is not available in an IPO, because all the coins are all given away to investors at launch. IPO coins are basically centralized stocks.
Then, there's the small point that having an IPO that isn't registered(Which is what all these coins have done) is illegal. All those developers that sold coins in an IPO, have done so illegally and will at some point be charged.