I don't think we are suppose to be talking about Bitcoin investment been guarantee or not because to me it doesn't make any sense though it is good to be realistic but how will one be talking about what they are investing into in such way. Even if it is not guarantee like you guys said it shouldn't be something you guys will be emphasizing on like this because this information can mislead or change newbie mindset towards Bitcoin investment because if we say it is not guarantee then what is now the difference between Bitcoin investment and trading since they both are not guarantee so I will advise we don't use this language or word here because of the effect it will have on someone who is yet to know what Bitcoin is all about.
I don't see any reason why a new investor will change his mind from investing, just because he/she heard a conversation that Bitcoin investment is not guaranteed. Such a person doesn't want to invest at all, he is just procrastinating. No investment is 100% guaranteed in this life because a lot can be a hindrance for us to be successful in it, even personal factors. What is guaranteed, based on Bitcoin history, is its long-term growth over years. Looking at 6 to 10 years from now, not next week, next month or next year, short term investment success cannot be guaranteed. Bitcoin has always shown an assuring upward trend over time, but trying to predict the price in the short term as a means to guarantee investment will be in vain. The increase is almost inevitable in the long term, the choice is ours to make. So new investors should be happy that there is always an opportunity to profit in Bitcoin if they start their investment now. What people say or do should not limit them unless they are not ready yet, that is why they keep giving excuse for themselves.