I am neither worried about my stake nor do I want to point to any downside of PoS coins, I saw this whole more as an open-minded discussion what in theory might be possible. I agree on all your points, except that the influence on the price you mention in point 2 can probably be reduced significantly with an appropriate trading strategy. Further I was just wondering what would happen if this guy would invest the required money to take over BC in hash power, will he be able to fork Doge?
All these scenarios are very unrealistic and the whole point was more related to all alt coins.
In order to do that (trading strategy) would require a very long time... much longer than simply paying a few thousand to develop a sham exchange and fund a small amount on the fiat side to encourage the majority of BC volume to move to that exchange... only to fake a dump, buy the coins, and begin the laborious process of
attempting to double-spend... all of which would 'smell fishy' long before it would be likely to result in anything of value (in fact just dumping the exchange and running with the cash would be easier and arguably more destructive to public opinion... a la Mt. Gox).
On the second point... it would be possible on some pools to do exactly what you've proposed... however, part of our pool (at least as it's been described by TheBlackDogOfWallSt and St. GNU) is to avoid exactly this problem by merged/split mining and 'benevolent' dumping of the mined coins. So even if someone controlled 1Th/s
of scrypt power... and pointed that at the pool... which would be enough to fork any scrypt coin in existence I believe... their hashrate would instead be spread out across multiple target coins in an attempt to avoid that from occurring.
At the end of the day, even if they were successful... the worst that would occur is they get no BC for their efforts, and a different coin gets destroyed. Again, rest assured that these are irrational fears... there are plenty of
rational fears in cryptos to worry about before wasting too much time on these extremely outside possibilities.
