"I keep my wallets in a private cloud. I don't see how a border agent could know they exist." "Do you have a private cloud? Do you own cryptocurrency?" Watch

"I keep my wallets in a private cloud. I don't see how a border agent could know they exist." "Do you have a private cloud? Do you own cryptocurrency?" Watch your reaction while you realise that you've likely committed an offence if you deny it, etc. One day in the near future, they likely have algorithms giving them a likelihood that you fit the type, and that will suggest their line of questioning - whether it's about data storage or propensity to work while on a tourist visa, or whatever else. In the short term I imagine it will work, but I don't think it will work forever.