If bitcoin rose to 1M I would sell all my bitcoin and invest in buying an house cause buying an house takes away some monthly costs which allow me to save more money and invest more money.
I would keep investing in bitcoin still.
this is something more people should do. invest in things with a value. because even if fiat and banks or bitcoin go overboard you have something of value, while other people holding only fiat or bitcoin or stocks in big numbers might lose all.