Hi Steven, Thank you for reaching out to Finder. However, keep in mind that some ATMs require verification if you go over a certain dollar amount, but usually, the threshold is high enough that a minor will not cross it with the funds that they have. Bitcoin alternatives Mining. This is one of the safest ways to get BTC. Cryptocurrencies are speculative, complex and involve significant risks — they are highly volatile and sensitive to secondary activity which may be one of the reasons the bank denied it.