Dump £35000 into premium bonds to bring me up to the £50000 cap.
Max out my S&S ISA.
Pay off all my student debt.
Invest a heavy amount in ADA & ETH.
Buy a house or two.
If I have children at the time, put 9000*18 into a bank account and max out their children’s ISA every year to give them a nest egg. Also set funds aside for them to study (preferably abroad).
I would pay off my brothers mortgage and set up trust funds for my two nieces. I would give money to my brother and also my parents.
I would give money to the people close to me and make some contributions to some charities. I would love to travel to some new places. Not really into material things so would not for eg buy an expensive house and car just for the sake of it. I would get a newer car though. I would play much more golf and get some much better clubs.
I would give money to my partner and buy her a property.
I am sure there are many other things I would do but these are what spring to mind.