I might be stupid but... Can you really mine ERC20 tokens? Zilliqa is in the testnet stage right now. If you look at the roadmap you will see that Testnet 2.0 will be released in Q2 and we will get the Mainnet in Q3
I think that the current growth is due to all the exchange listings and might slow down again a bit as the mainnet release is not before Q3. But then it should rise sharply.