I've used coin mixers in the past with good success but since a few wallets like Coinomi have built-in exchanges such as Changelly and CoinSwitch would a short-term exchange of BTC for say, Monero accomplish the same purpose of eliminating the visible trail of coin custody? If so, I would assume that the length of time spent in the alt-coin wallet could be minimal before being brought back to a fresh BTC address.

Any thoughts?