Bitcoin has a great potential yes and it is also a nice asset that one should invest on but saying that if someone invest in long term that they will have profit and it is 100% sure is what an investor is not suppose to tell someone especially a newbie because we don't know what tomorrow holds for Bitcoin, as a matter of fact no investment that it profit or return in long term is 100% sure or guarantee perhaps we should put away the thoughts of Bitcoin profit being 100% in a long period of time, remember what we are using to invest is what we can afford to let go so telling someone for sure may look like misleading the person, that is making the person to invest more than they are suppose to... because of the assurance you gave them.
You are still not understanding the concept of investing in long term. Every Bitcoin investor that invested for long term has made profits and can boost of a successful investment. Over the years, Bitcoin has not failed any long-term investor. If you choose to invest now and hold for 5 to 10 years i am assuring you that you will be profiting from your investment, then. So, i don't see any reason why an investor cannot tell another investor with certainty to invest for long term.
I understand the fact that no investment is guaranteed. However long-term investment is different. If an investor properly stays committed to their Bitcoin investment and reach their investment goal for long term that investment will be successful.
Well you have a well clear and convincing explanation over the years bitcoin has consistency shown growth and from the track of time in history bitcoin has nerves sell, most lake this commitment and patience which is reward are substantial