Reading wallet.tether.to/transparency shows they are issuing Tether tokens on more networks than just Bitcoin (Omni layer) now. This includes Ethereum, Tron, Eos, and Liquid (in order of volume). I find this rather interesting. Many blockchains support issuing tokens, but the security of their respective networks is more concerning as the networks get smaller.

I would only hold Tether issued on the BTC or ETH networks, and only for a short period of time in order to purchase the cryptocurrencies I wanted. Simply holding Tether is unwise.