$10 Billion to Mars?

So I have faith, we all must have faith but Elon states it is projected to cost $10Billion to get to Mars? Well shit, Walmart makes $450 Billion in a year with over $100 Billion in profit.. same goes for mega companies like Apple and hundreds more.. our countries have operating budgets of 10billion for stupid things.. you'd think everyone could and would do it if that's the cost? Hopefully the race gets heated and we are there in 5 years.

Is it that crazy to believe? Where were we 5 years ago? No iWatch, geez we were at iphone 4 I believe then.. what if 5 years from now there's an iRocket hahah (patent pending) iMars, iSpace I should copyright it all now