60 btc
How would you invest that amount? What will you do? Hold it dreaming the price will rise? Sell it and invest the fiat? or start a business? or retire? Any ideas?

That's the biggest number for me, if 60 BTC is made into $ it's fantastic, for me it will be divided into sections.
1. 30 Bitcoin, I will invest in the long term, waiting for prices to go up as high as possible and then sell them.
2. 10 Bitcoin, I will make it for gold, gold investment futures.
3. 20 Bitcoin, I will make it as a business capital for the future, meaning business ventures such as cafes, restaurants or oil companies such as gas stations, diesel etc.
I think opening an oil company, with a budget of 20 Bitcoin is sufficient for the start. This business can be for long retirement levels.
I think this is what I do, if I have 60 Bitcoin.