not sure it's whole goverment speaking here. week ago, Head of Payment and Settlement Systems Department of Eesti Pank told that crypto is a ponzi scheme
That's a lost battle. At this stage a lot more people are aware of cryptocurrencies than of the concept of Cryptography, and slang like that always follows the majority consensus.
Everyone I know that refers to cryptocurrencies as "cryptos" are definitely aware that there is more to cryptography than tokens.
It absolutely is a battle we can win.
What battles has linguistic prescriptivism ever won?