Bitcoin being pseudonymous can’t do what monero does, which is provide complete secrecy of transaction details. Bitcoin was never designed to do this, but monero will *never* see the gains that bitcoin will, so it makes little sense to hold your stack in monero. But if you want your purchases truly untraceable from your KYC-bought coin, hodl bitcoin, then either: bitcoin—>monero—>spend. Or: bitcoin—>monero—>bitcoin—>spend.