If you do not understand about it, you should not be too risky. Crypto currency is the future, its value will be higher and the future will come closer if the crypto currency has more practical applications.
That's true we should not give everything that we have to anything or somethibg that we are aiming to achieve, better to leave some for yourself,like in this case this person will invest all his savings without any assurance that he will be having back his profits since he is not that exposed to something related with regards to investing which we can a big risk to take.