let said ALice own 10 BTC at address "ABC", at block height 3,456,700, it was hard-forked to Bitcoin "Zaza".
At block height 3,500,000. The stable version of Bitcoin"Zaza" wallet is available. Thus, at block 3,456,710, Alice uses her old bitcoin wallet software and transfer out all her coins into another address "XYZ".
Then, at block height 3,500,000, she uses Bitcoin "Zaza" wallet to claim her Bitcoin Zaza. Is this method safe?