Maybe a better term is "less risky". Although we do know how volatile cryptocurrencies are compared to stocks, forex, gold, and real estate, at least responsible long-term investments negate the effects of constant ups and downs in the market. But I will never call long-term cryptocurrency investing not risky. If it is not risky at all then there is no need to create tips like watching its volatility and investing only a portion we can afford to lose. If there is no risk, then we can just all-in invest all our funds allocated for long-term goals.