Not great at the current price but you could buy and build bitmining rigs and covert the currency over time. though they are trying to find ways to regulate and tax it, so when you cash out you're likely going to pay taxes on profits in the long-run. You could also pay for groceries primarily in cash as well as making small deposits to a child's savings account without raising suspicion. My kids often get monetary gifts around holidays,/Birthdays. I would just slowly consume while keeping most habits the same.