If you're transferring your coins to a native SegWit address, such transaction would be invalid on the BCH and BSV networks because they don't have SegWit, so you don't need to worry about it. And other forks should have implemented replay protection to prevent such problems. I have many empty addresses that still hold the forked coins, and there wasn't any problems with replays.
Just make sure to prioritize the safety of your bitcoins first - never put a private key that still has Bitcoin balance in any altcoin software.
Thanks for the tip.
Which wallet do you recommend the most for Bitcoin transactions on mobile devices? I have an Android phone and want to do this with the most secure and/or trusted reliable Bitcoin wallet. It should be a matter of sweeping the private key, and sending the funds to the new native SegWit address.
And to be honest, I did not know about "replay protection". I've thought that sending coins through the original chain, will also reflect itself on other chains. Sort of what happened with the Ethereum Classic hard fork in 2016. It's a relief that all forked chains live independently from the original Bitcoin blockchain. Else, I would've lost the opportunity of selling the other coins for free money.
