Rags to Riches

[Soups]

Invest it.
Invest it.
Invest it.
Invest it.
Buy a normal house.

You bet I would be all over stock market with that stuff. I would not spend like a nutty nutcase. I would divide my winnings by 65, the number of years I have left until I'm 100 years old. So say I won 20 mil, I would divide that by 65 and that comes out to be $397,692 per year. That's my set yearly allowance. I mean that's PLENTY to have some fun with, but I wouldn't go buying super mansions in Hawaii with more exotic cars than fingers and toes.

I wouldn't need to work a full time job, but I'd still like to do something constructive and not just veg. I'd probably open up a fun kind of business as well.

That's actually pretty wise! $400,000 is MORE than enough as a yearly allowance. You can do quite a lot with that.

20 mil?
Pay off my parents mortgages
Buy a house (not a mansion but a decent house, with a big garage...)
A bunch of old cars to fix up. (FC and FD RX7s, Mazda RX3, S15 Sylvia, AE86 Toyota Sprinter Trueno, Toyota Supra among others)
Not sure what else.

I'd definitely take care of my parents first too. I'd probably buy the both of them a home (they're separated) and give them money as well.

Put at least a half of it into a savings account (for future investment/emergencies)
Send my grandparents on a nice holiday
Donate a significant proportion of it to mental health charities
Completely redecorate my grandparents' house
Spend a month in Japan

I've never been to Japan! I'd love to visit.