I dont think so. For once the active community here is clearly in favour of POS, there was no one to raise any concerns. I believe BK wants NAUT as an investment, with investors getting rewarded for holding the coins. If that is the intention of NAUT, POS is clearly the way to go. POW is not exactly a benefit for early buyers, as new coins are constantly generated and devalueing investments. The community is dicsussing changing to POS since weeks now, most of the work is done, we wont go back.
POS has some disadvantages, no question. What happened to VRC would have been pretty severe for any coin, POW or POS, and what happened to NAV and C2 was bad, but could have been prevented if people were staking their coins.
Nothing really. Its hard to say exactly how many coins you would need for an 51% attack, that would depend on how many coins are staling and coin maturity. 30% might be a good estimate. That means one has to buy roughly 1.6M NAUT at todays prices that would be an investment of 180.000 USD, in reality much much more as the price would start moving up. 100k coins is not nearly enough to attack the network.
Personally I would love to see this coin PoW X11 with DGW or a Digishield fix. But whatever, if PoS has been decided. So be it
I was hit by the C2 attack myself. I lost a considerable amount (indirectly through increased money supply there), though I still support C2 as they have dedicated devs that are really trying hard to succeed, sometimes they run into troubles, but they deserve my support I think.
Anyway, as I wrote there are pros and cons. If you want to read a really lengthy discussion, have a look at the nobl thread (page 380+) or emc2, they are currently discussing the switch to POS and have indeed a Poll about it.