It can not be said that ETC will completely disappear from the market or have…
It can not be said that ETC will completely disappear from the market or have no growth potential. In fact, ETC still has significant revenue from digging ... do not forget "miners follow the money".
Pros
Continuing to use proof-of-work, in the future it may be possible to develop a hybrid between proof-of-work and proof-of-stake.
The minting block moves to the stakeholder operating under the mortgage principle
Decentralized construction for diggers
Cons
ETC's major issue is the lack of backwards compatibility with Ethereum Hard Fork. All influential people in the Ethereum community have moved on to the new series, which means that anyone who is part of the ETC will not be able to access any ETH updates. The perfect example is the transition from ETH's Proof Of Work (PoS) to EO Proof of Stack (ETS), ETC will not be able to do so because their software does not allow the use of updates.