This is all from the point of view of a decentralized, p2p, no kyc exchange. If you pay for bitcoin with an interac e-transfer, I have heard the bank has no idea where the money went, or at least does not know you bought bitcoin. Is this true?
Once you have bought the bitcoin, do the banks and the government know you own bitcoin? Do they tax you on that?
If you buy Bitcoin in local or centralized exchanges they might know you own it because you'll do KYC. There's 2 kind of P2P exchanges, custodial P2P (e.g. localbitcoin, paxful) and noncustodial P2P (bisq, hodl hodl) of course custodial P2P are more centralized.
When they didn't know where the money went, they could suspect it as money laundry and frozen your bank accounts.
When you buy monero with bitcoin, do they know you now own monero, or are they just guessing that you do, in other words do they have proof that you bought monero? Do they even know you bought monero? I am eagerly awaiting an answer as I think these are fundamental questions.
If you buy on unknown and centralized exchanges, there's a chance they can know you.
Also, what is the advantage of using Bisq over other decentralized, p2p, no kyc exchanges.
Bisq is fully decentralized rather than other exchanges, your privacy will be safe.
IMO you don't need to buy monero with bitcoin to protect your privacy because you'll charged more fees for transfer, convert etc. Better to use bitcoin mixer (e.g. Chipmixer)