A bit out of context here, but I am curious about one thing. If monero is completely untraceable am I correct to assume that it would be impossible to trace btc on the following cenario:

1) Buy btc on any place(address 1)
2) deposit btc on poloniex(account A).
3) change btc for monero.
4) withdraw monero.
5) deposit monero in a new account on poloniex(account B).
6) change monero for BTC.
7) withdraw BTC(address 2).

Is it safe to assume there is no way to connect account A to account B or BTC address 1 to address 2 ?

Thanks