But I suppose some crypto owners are changing their tax residence without declaring their crypto i.e. no deemed disposal and exit tax.
Want to buy a house? Now you need to convert your crypto into fiat and a deed transfer. People will start asking where your funds are coming from. This is where you tend to get caught.
This is a weird statement.
If it's a cash offer, it's a seller's job to determine if you have the money, not if you paid taxes on it.
If it's a mortgage down payment, then the bank is more interested in if your assets are going to disappear (e.g. are they actually a loan from a third party?). I've never had a mortgage bank inquire about my tax situation.
If you're talking about IRS audits... then yes, they might be curious how you purchased a giant asset without any declared income. But that's similar to any unreported income situation.
>This is a weird statement.
Not in the UK. Here there's a legal obligation on the conveyancing practitioner - which you have to use - to confirm the source of funds for the purchase. They "will ask questions about your salary, request bank statements and ask you to give details of any family inheritances"[1].
[1] https://www.bannerjones.co.uk/your-property/services/buying/...
Or has it always been a thing?
Yes, but your bank and the bank of the seller both have strict KYC/AML rules to respect. And the seller probably doesn't want to accept a pile of bills that requires laundering.
Honestly, to op's point, the IRS audit would be the likeliest to nail you, post-purchase.
"Person without demonstrated income suddenly buys expensive asset" is hard to hide and a huge, trackable signal.