It is not bad at all because the comparison is only between equal persons or subjects. But since the subject is buying a house at present time. So without buying a house at this time if the money for buying that house can be invested in cryptocurrency or bitcoin, then after a few days, it will be very easy to buy more things including houses much better than before with the dividends of this investment. So in my opinion buying a house at this time is an essential waste.
It won't be just "after a few days" investing in crypto won't be the same for all. While those that invests for long and at the right timing of bear market and will sell on the bullish period, it won't come easy for them. Those that have money ready to buy a house, do it as soon as you can because mortgages are increasing, real estate isn't going down anymore unless there is a sudden pop of the bubble market. And to those that are renting, it's not a waste of money if that's what you can afford for now while preparing to purchase your own home.