Its already a dead coin, I also earned talk token before in the cryptotalk forum and I am really contented with the earnings I gained on that platform but with the number of talk tokens, they have given to their users the price of it goes down so hard for one week before it goes into a dead coin. Try other coins and don't invest in a dead coin you will just lose money on that.
You are right, when there is no movement of Talk coin transactions, it can be said that the coin is dead because there are no investors who buy the coin. Although occasionally there are transactions that jump up, it could be a trick to attract investors.