Safe to send BCH split from BTC from a hardware wallet still containing BTC?

[shirasu]

Hello, my first post.

Background: I purchased a small amount of BTC years ago (yeah, yeah, if I'd only known what would happen to the price over the years) and keep it in a Keepkey wallet. When the BCH hard fork occurred and Keepkey eventually supported BCH, I split the two coins in Keepkey and continue to keep both my BTC and BCH there. But I've never split my BCH after the BCH SV and BCH ABC hard forks occurred. I understand that Coinex will automatically split BCH into BCH, BCH SV and BCHA if I send my BCH there. But is it safe to send BCH to Coinex from my Keepkey wallet if I still hold my BTC there?

If not, what is a safe method? Should I get another hardware wallet (or a software wallet) and first send my BCH there, and then send the BCH to Coinex from that other wallet? OR should I sent my BTC to the new wallet and send the BCH from Keepkey to Coinex?  Or is there some other relatively simple method for split the BCH while keeping the BTC safe?

Another, more general question: What happens if I send an unsplit coin to a wallet that supports that coin but not its airdropped "child?"

Thanks!

[LoyceV]

But is it safe to send BCH to Coinex from my Keepkey wallet if I still hold my BTC there?

If your Bitcoin and Bitcoin Cash are split, sending one of them doesn't influence the other. You can send your BCH without sending your BTC.
However: BCH, BSV and BCH-A don't have replay protection. That means that sending one of them will most likely make the coins move on the other chains too.

I understand that Coinex will automatically split BCH into BCH, BCH SV and BCHA if I send my BCH there.

I don't know if this is true, I've never used Coinex.

What happens if I send an unsplit coin to a wallet that supports that coin but not its airdropped "child?"

In general: you lose the Forkcoins! Most exchanges don't recover coins sent to the wrong chain.
That's why it's better to send Forkcoins to wallets under your control until you've successfully split the coins.

[bitmover]

You can read a detailed guide on how to split your coins here, using coinomi (a somewhat good mobile wallet)
https://coinomi.freshdesk.com/support/solutions/articles/29000036500-bch-bcha-fork-splitting

Splitting is only necessary if you had a positive BCH balance on November 15th 2020. If you received either BCH or BCHA after that date, they are most likely already split.


    Receive a new deposit into your BCH wallet of BCH that is already split. Any value will work, no matter how small. The easiest way is to receive BCH from an exchange. If you are sweeping unsplit BCH from a paper wallet, you must still receive split BCH from somewhere else before moving to step 2.
    After transaction from (1) is confirmed, open the BCH wallet and copy your current BCH "receive" address
    On that same BCH wallet, go to the "send" section and send your full BCH balance to it.
    Done. This should be enough for your coins to be split. This process only has to be done once. After your coins are split, they are split forever, and further deposits you receive will also most likely already be split.

Be careful to transfer all your bitcoin (btc) to a fresh new wallet with a new seed (it can be a new wallet in the same device) before doing any procedure with your private keys.

[LoyceV]

You can read a detailed guide on how to split your coins here, using coinomi (a somewhat good mobile wallet)

This "skips" the step of first splitting BSV, OP's coins are older than the BCHA-fork.

I'm currently trying to do some splitting from multisig myself, turns out ElectrumSV has a lot of dependencies to install. I also found out Coinomi can't send a small amount of BSV to a multisig address, so I can't use that for replay protection.