When an InstantX lock is achieved (takes a couple of seconds usually) and broadcasted (and the merchant will see in his wallet the tx got IX comfirmation), how do you propose to reverse that?
Read the thread and find out.
Before I do that (please consider I'm not a crypto developer, just a random user with cursory knowledge compared to you guys), could you even give a hint does it involve having 50% of the mining power as well?
If you own a majority of masternodes why would you do something that undermines your wealth? The 1000 coin collateral is there for a reason and that is to have an incentive for the nodes to act in the best interest of the network
Yes, this is the common rhetoric we hear from POS stake disciples as well. Despite the fact that you can short coins on exchanges these days,
this argument does nothing to dissuade the irrational attacker.
I don't think I claimed it did. Anyone (with enough resources) could buy up all Bitcoin miners and do what ever he wants with them. Should I dump all my BTC asap?
Regarding shorting, to be able to short there needs to be actual coins on an exchange so they can be sold in the first place. Most coins are in the masternodes, a lot are in hot/cold storage controlled by random holders/users, and a tiny percentage is in the exchanges, and even tinier percentage of those are being offered for shorting. Hard to make profit shorting considering the amount of masternodes you'd have to own. Of course the possibility to do so is there, but it's not as simple as it's being made out to be.