If some financial institutions use cryptocurrencies to launder money, the fault is purely of these institutions not of the blockchains that where used in the process.

CoinDesk: "the market mood may have soured due to rumors that the U.S. Treasury is planning to charge several financial institutions for money laundering using cryptocurrencies".

I really don't understand why people get so scared for news like that.

Which currencies are better to fight money laundering? Fiat currencies with untraceable transactions or currencies with a public ledger where every transaction is recorded and of public dominion?