You should if you have that much bitcoins i think it is a great investment because you invested in bitcoin and then when it went high then you selled it to buy a house and live in it an extra
investment would be that you let other people live in it and the pay you rent.
Actually it something you must buy once you have enough bitcoin or any altcoin to buy it since it's one of things that humans need. Since bitcoin is a currency or online money then you must consider buying a house, a car, and make a business once you have enough bitcoins.
Just like what you've said, bitcoin is an investment where you can get some money to buy things you really need.