ok... so who is saying that those 20 B KARMA coins that were stolen are now not in investors hands... so no need to think of those coins as stolen as they are maybe already dumped... so you can go ahead with a fair swap on Yobit so that we know that it is 100% safe... 
See this link: https://chainz.cryptoid.info/karm/wallet.dws?400656.htm
It's a stolen wallet. One of SEVERAL stolen wallets with more than 1 billion coins. (Coins from this particular wallet were also exchanged for KTN. However 15 billion coins are still left in it.)
Would you like those coins to join the swap? How many coins do you have, in comparison? How about the other wallets with billions of stolen coins? Even the original developer stole billions of coins from Karma via malicious code in the original wallet. These amount to a significant percentage of total coins. No economy can grow like that. New investors may be turned off. Other investors may not buy as much, knowing that so many coins could be bad. That's the reality we find ourselves in, and we should probably face it.
Are you okay with tens of billions of stolen coins joining the swap? No one has yet answered this basic question. Can you be the first?