For me the 300-400K is a non-issue and will be gobbled up on the market in roughly 3-6months when people see the true longterm value of Monero.
We're not saying its an issue, we're speculating about the amount and weight of the top few holders.
If someone still has that many coins now with all the attention around XMR they are unlikely to be offloading a significant amount due to liquidity and by the time its liquid enough they won't want to sell them, in fact who does?
True but not everyone follows the 10/200 strategy http://david.latapie.name/blog/extended-10200-strategy/ like David has analysed.
Then we have some people that need the money and some that are happy with X $ amount or do it solely for BTC.
For the next 4 years I think that XMR will strive but the issue after the initial emission curve to me is something Fred Wilson from Paypal has mentioned :
“I also think we need to see real transaction volume happen. Right now, most people who get bitcoin hold it, they don’t transact with it. That’s part of what causes all of the volatility — if there was a very vibrant system where bitcoin was just getting swapped around like crazy, the velocity of the money would cause bitcoin’s price to stabilize and there would be a much more liquid market. I think those are the kinds of things an economist would want to see.”
I think Father Risto is not far of with his 260K calculation for the top holder
"I am now fairly certain that the 5 largest holders together own 20-35% of the total supply" this will probably be lower in the future imo.