I don't think it's a good time to buy ETC., because it's still a bear market.
And when ETC is added to Coinbase, there may be a big drop, and I don't know why Coinbases choose ETC.
You didn't seen the opportunity to buy ETC even in the bear market because possible for ETC become too expensive in the support of one of the pioneers exchange coinbase.
But of course you have own brain to decide what is best for you everyone have an own decision and choices in life.