Unless your $5M came from lottery or inheritance, when you get there you will still fly economy because old habit doesn't go away.I remember sitting at a swanky San Francisco bar with a friend, 2 college students with part time jobs, dreaming of what it would be like if we had $1M when we retire.
We still laugh about that era as we aim for $5M before 65!
For me being wealthy is to fly business or 1st class wherever I fly without thinking about cost. I'm definitely not there!

.... To be fair, the whole market took a dump and it's not over based on after market.