1) I send my crypto assets to the account of my mother in law, who is approaching 80 years old and lives outside of the European Union.
I would let her go through KYC but I manage the account and passwords. I would link her account to my own hardware wallet. I intend to sell most of my crypto by oktober of 2025, and buy back in 1 year later. Once I buy back in, I would send the assets from her account back to my hardware wallet.
Let's say you live in Spain and your mother in law live in Thailand, if you access her account when you're in Spain, the exchange will detect there's a suspicious activity since a Thailand account get accessed by Spain IP address.
If you use VPN, you broke the exchange terms.
Advantages:
a) There is no bank payment trail to her account, as the crypto assets are deposited through stablecoins.
b) If the tax man in her country finds out some day in 2040 after she is no longer with us, I don't think he can collect penalties and taxes from someone who is no longer alive
You need to read this.
CPA here, practical advice, certainly not what internal revenue code would say. Walk away, leave any tangible asset he has alone (bank accounts, vehicles, property, retirement accounts, etc) sounds like he didn’t have much anyway, so basically you’re just letting the cash in his bank account and any valuable property escheat back to the state. Obviously take care of the dogs, but that’s a moral thing not a legal one. The IRS has no interest in taking them so make sure they’re okay.
If you take the cash in his account and move it to yours, you’ll have a whole different set of problems which will likely be far outweighed by the amount of tax he’d owe for 40 years of income. Also- make a promise to yourself that you’ll never put your kids in this situation and take whatever actions necessary to ensure that.
In the end, it's all depends on the regulation in your country. But, I would suggest you to do tax avoidance (where you report all of your income and use any way to reduce the tax) instead of tax evasion (where you either report some or not at all in order to avoid paying tax).