I think I know what you're getting at, but say more about what you're thinking on this one so I don't put words in your mouth.

DO NOT invest more than a tiny proportion (single digit percentages) of your net worth in one of those ETFs. Do so knowing full well you intent to cash out within the next 2 year period or are otherwise setting alight your wealth.

Those ETFs and paper claims are going to go to zero, the underlying assets will be confiscated. Read the book The Great Taking if you want to know how. Legal precedent already exists. It's been in the making since the 1970s. The likes of JP Morgan, BlackRock and (in their own words) "The Protected Class" will take the underlying collateral inside those ETFs. There is not enough collateral for the paper claims that exist in the system. You will likely not even see 25% of what you believe you are "owed", the legal documents clearly state you are owned nothing in the mathematical certainty that it will all unravel.

Yes we may even see some high-profile bitcoiners under wrench attacks to get people thinking like @blue_words. To think that it is "safer" to trust others with their wealth. Don't be so weak minded. That is the type of psychological trickery and attacks on individual sovereignty that will occur in this crumbling society. They don't even need to 6102, if you trust them and have this philosophy.

If what is written in that book comes to pass, it will be the biggest confiscation of wealth in human history. It is all laid out, across all Western countries. It may however take more time to play out though, at the top of the next bubble. Once they have enticed the world-in with manic ATH prices and provided Bitcoin with "credibility". Persuading you to buy their toilet-paper IOU rather than pristine BTC.

security through obscurity!