False. If you have pre-fork coins, you have equal amounts of post-fork coins on each chain. There is no "worthless transaction." You can safely split the coins and spend them both. The split is achieved by broadcasting a transaction on one chain and a doublespend of it on the other. If you don't doublespend it, someone else will probably leak the transaction to the other chain; you will still have coins on both, and can just try to split again until it works. There is no risk of accidentally making your coins unspendable, and I suspect you have implied this possibility for the purpose of tricking people into not trying. I know it's tempting to believe that your stupid fork will happen because of the overwhelming amount of USG clones spamming this thread, but the fact of the matter is this: #bitcoin-assets will win the fork war, and the doublespending of coins will only benefit us.