You can use the only HWW with native coinjoin: https://wasabi.kravens.nl/#trezor

There are three main ways you could do it: Coinjoins, lightning, or monero.

Big coinjoins are decent but I think with the better privacy options we have available today they feel kind of outdated. More expensive for relatively weaker obfuscation. And the effectiveness of blinded coordinators not being able to deanonymize users has been called into question lately (Wasabi and Whirlpool. JoinMarket has other problems.)

I think hopping "off-chain", whether that is an L2 or via a different blockchain that is encrypted, is more effective since it wouldn't be obvious to any outside observer that you left and returned to Bitcoins blockchain in the first place. It would just look like any other normal transaction (when in reality it was a swap for something else "off-chain"). Much more difficult, if not impossible, to follow.

With a big coinjoin it is both fairly obvious that 1) it is a coinjoin and 2) that you own some of those inputs/outputs and later could be narrowed down further by mistakes of the other participants of that coinjoin, mistakes you made, and additional metadata

So that leaves Lightning and Monero. Different advantages.

Lightning could work, but depends on how much you're wanting to move around. Successful transactions are inversely related to how much you're sending. Could run into routing problems potentially.

Quick and dirty on the method I would use: BTC -> Monero -> BTC (swap back to BTC in different amounts to different addresses at random times over the course of a few days)

Recommend doing all this p2p using Retoswap or Bisq. Both use Tor by default. Don't use instant exchange websites.

If you want to try Lightning instead you could do pretty much the same method above just use Robosats. Use wrapped invoices when receiving on Lightning (Either with Zeus wallet or lnproxy.org)

You should do several rounds of coinjoining, ideally some as taker and some as maker. You can use JoinMarket for that.

An alternative is to swap in and out of Lightning Network. For less than 5M sats this is probably cheaper than the coinjoins. Tool: SwapMarket

It's important to understand your threat model and the sources.

There aren't a lot of privacy options these days... for obfuscating on-chain. In the future a 'blend' of privacy and transparency will be most realistic as perfect privacy is really difficult.

Imo probably the most 'decentralized' survivable coinjoin available is joinmarket. Read about it here: #521035 https://github.com/joinmarket-webui/jam

Best of Luck

the coinjoin wallet will take one seed and give you 4 address collections:

deposit_utxo mixing_utxo coinjoined_utxo busted_transactions

you send from jade->deposit

use the coinjoin tool to spend from deposit->mixing

Consolidate out of mixing->coinjoind

if anything goes awry, the utxo ends at busted

you might be able to restore the coinjoined_utxo address collection to your new hardware wallet, if you get your derivation path setup correctly. this would be helpful because you decrease anonymity if you spend more than one joined utxo at a time

somebody correct me if I'm wrong, plz

Wait - doesn't Jade support HWI? Because at least Wasabi supports HWI.

Update:

I had a little convo with Claude and passed to it some of my own thinking and understanding, and this is what I've come to:

The 3-Wallet System

Initial Cleanup Process

Jade (old coins) → Sparrow (mixing) → New Clean Wallet Steps:

It's not perfect, and not probably the "best", but from my understanding this is very well "good enough"