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If a person starts investing by acquiring only basic knowledge and then if he continues investing without acquiring any more knowledge, then he may collapse after a while. For example, due to lack of proper financial management, due to wrong decisions about investment, etc. Therefore, it is very necessary for a person to gain knowledge after investing.
What you are saying here is very true, basic knowledge alone about Bitcoin is not enough for a Bitcoin investor to have an be successful on the longer run, what all Investors are advice to do after starting is to seek for more knowledge on Bitcoin and what needs to be done to hold effectively, like having an emergency and reserve funds in place so that if for any reason an emergency situation arises in the future, you wouldn't have to fall back to your investment for survival or dip hands into your investment just to sorts out one emergency needs.
Lack of the right knowledge is mostly the brain behind most Investors failing in their investment, that's why going for more knowledge on Bitcoin is very much fundamental to the success of your investment.