There is nothing that can guarantee you success, everything has to be decided only based on possibilities, and this should be followed in the case of Bitcoin investment. Bitcoin will never give us a guarantee of success, Bitcoin has just a big possibility of success in the future, you only have to deposit Bitcoin believing in that possibility, success is not guaranteed here, and that is the risk, and if you can accept this risk, then you will invest, remember that nothing is risk-free, and success can never be achieved without taking risks, so if you have the ability to accept this uncertainty of Bitcoin, and believe in the possibilities of Bitcoin, and then if you accumulate bitcoin according your financial ability, then maybe you can achieve the greatest success of your life from Bitcoin in the future.
I guess he is too excited by the potential of Bitcoin that's why he feels like their is no risk attached to it, but in reality he is wrong and if he is saying it to someone, then he is misinforming others about Bitcoin because no investment that is risk free, and because we live in a world where no body knows what may happen tomorrow, so you can't be 100% certain of what tomorrow may bring, that's why we are advice not to go all in on our investment in Bitcoin, so that if it doesn't goes as planned we wouldn't be contemplating suicide or any bodily harm to ourselves.
So investing only with our discretionary income which is the money we can afford to lose is the ideal way to go about our Bitcoin investment because even though it future is bright, their is no 100% guarantee of it succeeding in the future.