why not buy a laptop for that purpose
No thanks, I've read enough about built-in Intel Me backdoor technology already.
Secondly Windows 11 itself is a leaky backdoor. Thirdly Ubuntu has long had telemetry that leaks everything
or get yourself a hardware wallet at once.
Are you sure all crosschains and swaps support hardware wallets?
I had a hardware wallet. I needed to buy some tokens. I went to the official site where these tokens are sold, click the "Connect wallet" button and in the list that appears, only metamask and other top wallets are visible, but my hardware wallet was not there.