Ethereum Classic is a crypto currency that emerged as a result of the hard fork event, separated from Ethereum (ETH).
Ethereum Classic is security-oriented, uncensored, publicly available where applications can be run. This allows people to trust Ethereum Classic as much as Ethereum.
Why did ETH Classic gain value so quickly?
ETC Labs, a research division of Ethereum Classic, has committed $ 1 million to UNICEF to fund blockchain initiatives that could tackle some of the social problems around the world. Thereupon, the new tokens released into the market gained value. It also created awareness and attracted users' attention.
Finally, I want to say this: Remember that between 2021-2023 will be the years of increase in the value of cryptocurrencies. I think Ethereum Classic will gain at least 4 times its current value.