It all depends on you. If you need a house and the real estate market in your area isn't already pumped to the sky, then why not? You can also choose to buy just started companies if you think they have a very high potential of succeeding.
That's true, it depends upon you if ypu really needed a house. But always save plenty of it, do not waste it for nothing, buy a house and continue investing. If the price is too high, you must gain more bitcoins then convert it into a fiat, then start another business while still continuing the bitcoin industry and that's a lot of money.