A house produces value; you can either rent it out, or live in it (thus avoiding paying rent to someone else). Stocks produce value; the companies make money (and generally either pay dividends, buy back stock, which is just a tax dodge approach to paying dividends, or invest in growth, and will thus eventually be in a position to pay more dividends). Bonds produce value; they are literally loans which (hopefully) get paid back. All of this allows a value to be assigned to them; that value may be greater or less depending on market conditions, demand, future value of money, etc (for instance, if your house is in the middle of nowhere and, by the time you’re done with it, needs a new roof and windows and so on, then its market value may actually approach zero). Things like bitcoin are different in that they do not produce value. You can’t value bitcoin based on X years of expected dividends/quasi-dividends or anything; any value is purely speculative.

To be clear, there’s speculation involved in buying stocks, too, to an extent (particularly buying _individual_ stocks), but ultimately you have a share of some real thing. That is not the case with bitcoin.