We don't need Dash to be anonymous.

1- Create an encrypted BTC wallet on your PC, connected via TOR

2- Buy BTC on Bitstamp with Fiat

3- Send BTC to your local wallet

4- Save the encrypted wallet.dat in cold storage or online drive, just to have a backup

Now, adversaries may think you sent coins to yourself , so that shady local BTC address probably is yours.

BUT, when they knock at your door they will find just encrypted data and you are not going to give them the password.
So they don't have the proof that BTC address is yours, right ?

You can pretend that someone hacked your Bitstamp account and robbed your coins

P.S. Alternatively we can use I2P instead of TOR, but i am not sure it will be more secure, i don't know the differences and implications from a privacy standpoint