Hiding the path of your bitcoin.

Iv sent bitcoin to 2 friends previously (during the last bullrun) from my binance account and trezor as they wanted to buy some and it was kind of “show them how to send / receive kinda thing”.

Since then one of them has gone big into crypto and has also graduated from some cyber crime course.

We were chatting recently over coffee about crypto and the best way to store it etc.

Fast forward few weeks and he comments to me about how I moved most of my holdings from binance to a private wallet (trezor) and wasn’t far off with telling me the actual correct amount.

I asked him straight out “were you tracking the wallet I was using” which I know is easily done and there’s no real expectation of privacy with the transactions. He just laughed it off saying there’s software to track a wallet in a fraction of the time it takes to manually do it.

Now, although I’d trust him etc I’m uneasy at the thought of him knowing how much I have, when I buy, when I transfer and ultimately when and what I sell. With my wallet address he can just see every transaction out of it. It’s like the same way you don’t want your friends to know how much is in your bank account / savings account.

How would you go about hiding this / breaking the visible connection to my wallet etc? I was thinking > sending bitcoin from wallet to exchange, swapping bitcoin for something else such as lite coin, sending litecoin to new exchange, swapping back to btc and onto my trezor? I know I’ll pay a bit in sending fees, soread, tax etc but I’ll take that loss.

Opinions?