The first thing is to have knowledge first, and you will see the reason why you need to invest in Bitcoin more and why you don't need to invest in shitcoins. Normally, in investments, it makes no sense when others give their opinions on what you need to invest in; the knowledge you will gain will serve as a roadmap for you.
The knowledge you will obtain will help you to understand risk and how you can manage it as well. Seek knowledge first; don't be too focused on what to invest in initially, because if you do, you may end up settling on the wrong opinion of others, which may affect you due to the lack of understanding.
Learn for knowledge first before doing your investment. Some people can invest money in Bitcoin without any learning but it is not recommended as this blind investment practice makes their mentality very weak. In this volatile market, lack of knowledge will lead to uncertainty and in most volatile times, such blind investors will more likely have weak hands, then sell bitcoins for losses.
By learning first, getting knowledge, people get good foundation for their investment start as well as long journey. It is helpful for them to avoid panic when market has tests aim at unknowledgeable, weak-handed and inexperienced investors. If they are well-prepared in knowledge, they are good to go through market tests and strongly aim at profitable investment result.