"Like getting into a bleeding competition with a blood bank"

This quote by Richard Branson is a metaphor for the idea that it is difficult to compete with something that has an abundance of resources. It is a warning to those who try to take on something that is even more powerful than they are. It is a suggestion that it is necessary to be practical about one's capabilities and to not overstate one's own abilities. It is also a reminder that it is very important to be familiar with the resources that a person's challengers have and to not undervalue them. The quote is a reminder that it is necessary to be knowledgeable about one's own restrictions and to not try to compete with something that is far more powerful than oneself. It is a tip that it is essential to be practical about one's capabilities and to not overestimate one's own capabilities.