you ideally take investments if you'll be better off afterward than before. relating to percent share, that means that while you get diluted in percentage terms

you ideally take investments if you'll be better off afterward than before. relating to percent share, that means that while you get diluted in percentage terms, in dollar terms your cut goes up in value, so the percentage doesn't matter. on the other hand, the percentage determines control, so there's a balancing act involved.