1) It would instantly crash the price so there's no incentive to do so
2) It will never be a problem to run Bitcoin no matter how little Bitcoin's are available
SO in other words, Bitcoin will only appreciate with time, no real risks of holding long term, at least definitely not related to the total supply ever being modified because it makes no sense to do so.
Totally disagree. At the point where bitcoins are not be mined sufficiently to offset the cost of propagating the network, mining fees will have to rise dramatically to offset the loss of block coin generation income. In order to keep a decentralized network, the fee increase could be such that the only way to keep Bitcoin viable is to increase the cap on total coins, otherwise the mining fee would be so high as to fldrive people away from using Bitcoin all together because it's just too expensive. Either way, your conclusion that there will never be a problem is not accurate at all. Bitcoin's Board can't even effectively decide how to manage the minor problem of the needed block size increase. It gives me very little faith they can be trusted to handle an even more dangerous issue such as this.