There is no need to think of any other coin but bitcoin and no research is needed for one to know how to invest in bitcoin, apart from you making up your mind to invest in a long term when you have known the basic knowledge of bitcoin in which one of them is to invest in a long term.

A new investor needs to figure out how much from his discretionary income he needs to use in buying bitcoin constantly every week or month that will not affect his financial needs because that is when he will be able to buying always with such amount over a long period of time. If he has figured that out, he needs to get started immediately and start building his emergency funds with the other part of his discretionary income to be a back up for his bitcoin investment to avoid him selling when he is not yet ready to sell due to some financial difficulties.