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.
When you know that its price can buy a house then buy especially when it pump high because its not always happen so grab that opportunity. Also when you need a house then do not hesitate. But in the end it still depends on you. make a decision that you will never regret in the end.
Yes, strike the iron while it is hot. You never know whether it is the highest or lowest but if you feel that it is then do it. Having your own house is not regretable. It is already an investment. Actually you can improve it a little and then sell it on higher price. So if the bitcoin that you have can buy a house I would say you better do it already.