There are lot of myth and dreams are going on around about investment expectations of new entrepreneurs like they think having "funding" and "capital" will make them succeed. That's wrong.
What is true is, you do not need an investment to "start" on a business or project.
Even people thinks it's useful, it is "exactly not" until you grow on your field enough and become confident on what you do with some success.
"Money" is the latest piece required for a "success".
Taking an investment in early stages will only put you under some pressure and not able to do more flexible moves neither sharp decisions.
You might be sure of product, but still market can require some time to adapt your environment.