The bitcoin transaction is traceable only if it is from the exchange that needs a kyc or know your customer. If someone tries to track down that transaction, they will be able to know it since the doer of the transaction has given their information to the exchange. On the other hand, I think it is not possible to track down the doer of transaction if it doesnt have any kyc at all.
Unfortunately, cryptocurrency over time becomes more and more monitored by governments, which introduce and will introduce additional rules for its circulation for this purpose. If transactions will be used only between individuals, without access to exchanges and exchangers requiring KYC, then it will be almost impossible to track them. However, with the usual use of cryptocurrencies, we are increasingly forced to leave our identification data, which means that cryptocurrency will be increasingly monitored by governments.