Never send from an exchange, always send to an external wallet. I recommend blockchain wallet, you can add two passwords, 2-factor to authenticate transactions.
Keep in mind that you should always look for the padlock in the upper left of the address whenever you’re on a site. Don’t move our coin unless you see this. Cypto is full of phishing scams, so watch out. Always pay attention to every address you enter when moving coin, that goes for the source and their email address.
And BTC isn’t untracable, it’s actually completely traceable, LE if they want to do the work can trace it, but if you move it around from wallet to wallet and then only use that wallet one time and create a new one for every transaction you’ll create less of a footprint. The biggest problem is that you’ll have a btc purchase on your debit card, the cops know most of these small purchases are being used for drugs. It’s a no brainer when they see multiple $300-500 purchases.
One way to stay safe is to set up a bank account that is at a completely separate branch, only load up your account with cash at this bank in person, never deposit via check from your other bank. Don’t keep more than $1000 in the account. Don’t return money from your exchange to this bank account. You don’t want a record of this account being linked to your main savings account, especially if you have lots of money the cops can seize. You then hide this account, you don’t write checks, you don’t even have checks, you only use it for btc purchases, then when the day comes that you want to stop this, you simply close the account and seven years later all this data is gone.