Interesting...seeking legal advice and avoiding exchanges... However, how does one convert the coins from these puzzles into spendable cash without an exchange? And it’s somewhat disappointing not being able to spend it all at once if one wishes to, minus taxes and so forth. I haven’t found any legal provision that clarifies the management of bitcoins you ‘find’, or earn from solving a puzzle, or inherit... especially if you aren’t one of the big whales, who I suspect have their systems in place already )