Whoever has the awareness of bitcoin and did not invest now will regret it in future when bitcoin price hits 6 digits just like some people currently are regretting that they know about bitcoin in the early days when the price was below $1000 but didn't invest. Currently, I don't think that there is any good investment that has the potential to give you high profit like bitcoin will do if you invest and build your bitcoin stash for a very long time.
Why I like bitcoin investment is that nobody will know that you are investing and you don't need to be stressing yourself from one place to another under the sun. Bitcoin gives you the chance of being your own bank and your coins are safe under your custody. You have total access over your investment and no one will know how much your bitcoin investment worth.
2. Lack of fund: these are people who understands how Bitcoin investment works but because they don't have good source of income that can help them sail through...
Such person should look for a second means of income or cut down his expenses if he has the zeal an d desire to invest in bitcoin, he will find a way to invest with a little amount because you must not start buying bitcoin with big amount of money.