Let's say you got bitcoin (or any other coin) back when it was very cheap. You bought a hardware wallet, and you held it through all of these years. It's now worth hundreds of thousands (or more). Is it safe to say that you're still likely to be asked for the source of these funds even when they can see the funds has been moved from a dormant address?
Well you could probably still have a trail of how you obtained the coins, but even if you don't it should be quite clear the coins have not been moved in years and the only value worth considering is what they were worth when you got them in the first place. Nobody can claim money laundering if you got the coins when they were worth a few dollars, even if they are worth a fortune now.
But personally, I would still not put them on an exchange, as any third party would love an opportunity to take your coins away from you for whatever reason they can come up with. Selling them in a non-custodial fashion like on Bisq is still the better option.