Although there isn't a dividend, you still own a share of the corporation. Whatever money it has in the bank, or other assets, part of it belongs to you.

Right now, Meta has assets of $180B, and there are $2.7 billion shares outstanding. That means each share owns $67 worth of stuff -- about a quarter of which is cash in its bank accounts. That's ignoring whatever actual money it has coming in. Considering its future earnings, its current price of $90 is actually pretty good.

What good is that if you can't actually access those $67 per share worth of assets? The fact that they could, in theory, one day distribute it. It means that somebody else is willing to buy that share off of you -- knowing that somebody else would buy it off of them.

Essentially, that $67 is completely illiquid, but real. And the market makes it liquid, even though the actual underlying asset could remain fixed indefinitely.

It's kinda like getting a loan whose repayment date is "eventually". As long as you don't think it's just going to up and die, it's worth something -- as long as it could, in theory, be repaid.