I currently have my Bitcoin (BTC) on a Trezor hardware wallet with Segwit (Not in a "Legacy account").
Can I claim Bitcoin Diamond (BCD) with this or not?
In general: Should I move my BTC to a Legacy account to be more compatible with future forks?
I currently have my Bitcoin (BTC) on a Trezor hardware wallet with Segwit (Not in a "Legacy account").
Can I claim Bitcoin Diamond (BCD) with this or not?
In general: Should I move my BTC to a Legacy account to be more compatible with future forks?
Bitcoin Diamond does support segwit, so it is possible to claim it. However, it may not be possible to (safely) do it directly from the trezor.
There is apparently an Electrum for Bitcoin Diamond, which claims to support hardware wallets. However, I have never used it, and would be hesitant to trust it to not send the coins to its own address (maybe even from other chains).
If you really do want to claim it, I would suggest: