I've never done it but it can look like this. You borrow DAI against BTC. You send DAI to a EU licensed exchange and sell for EUR. You send EUR to your bank which asks POF. You show the loan, print some PDFs from the DeFi website. The f off. Then you buy a house with this money. Same story, you show the loan︀ and the exchange tx history. Then you pay off the loan with your other BTC.︁ Banks/Notary don't have procedures to continue checking if you still have the loan. That's why︂ ChatGPT keeps saying it's not a taxable event when I am asking wtf is DeFi︃ good for.