Problem: there's no consensus on terminology used for tokens

[yihuang]

Context: #45 (comment)

We need to settle down on the terminologies used for different types of tokens:

• ERC20 tokens on ethereum
  • ERC20 token
• CRC20 tokens on Cronos
  • CRC20 token
• cosmos native tokens on Cronos
  • coin
  • cosmos token
  • native token
• The CRO native token on Cronos
  • CRO
  • gas token

[thomas-nguy]

for gas token, I have been using a lot "evm token" as ethermint uses EVM_DENOM for the gas token denomination. But only internally in the code

[tomtau]

for native tokens, also ICS20?

[tomtau]

I guess this issue can be resolved by ADR + code refactoring if there's some inconsistent usage (do any of the terms leak into consensus-critical parts, such as network parameters?)