its price will continue to rise as long as ethereum is in pow algo. as soon as the ethereum goes to pos, the ethereum classic will receive a big hashrate in its network compared to before, its price will later either remain at the same levels or it will fall as they would sell it for profit. now if miners behave like ethereum by keeping it in their wallets, that would be a positive development.
There will not more ETC to be dumped if hash rate goes to ETC this is nonsense. Miners will receive less, so less profitable at the same price that's all.
As if ETC is the only coin that miners can switch to, we have Flux and Ergo too, about ETC if its price surge even more high difficulty won't be able to take over ETC, assuming ETC made it to 200$ what do you think will happen?
etc is older and better known to older miners. they have a large hashrate. I also mine the ergo with my own mining operating system and it really is quite efficient. I have not dealt with flux at the moment.