so short term, you're going to spend the money. Then you have taxes to deal with, and you no longer have money to spend.
Hinata, problem with yours: 5 million dollars on a portal, short term, you built a portal to Equestria. Long term: you realise they would still make you pay to use the portal, right?
having money that vanishes right before your eyes as you spend it all, and no longer have money to spend on what you want, and barely enough on what you need (paying taxes)
Looking selfish but spend a day in Equestria with your favorite pony, and have a memory you will always cherish.
I would rather look selfish, than barel have enough money to get by in life.