Great insight in your video. Something to consider is the whole ETF sector is in a bubble. The percentage of all investments that are now purchased via ETF has skyrocketed.
It won't be just precious metals ETFs that implode...it'll likely be all ETFs.
Another point to consider is asset allocation. Have some money in gold, some in silver, some in Bitcoin, some in high quality stocks, etc.
People get tunnel vision in an asset or two and forget diversification.