All choices in money terms, borrowing, not borrowing, keeping your money in a bank or investing in the stock market directly or via a pension are gambling. Ifypu are risk averse you are still gambling. The crypto currencies are a bet that one of them, and in particular the one you choose will emerge into a market where that is the base currency. Not investing in them is also a gamble as should one of them be successful then cash or traditional currency may be devalued.