A stock literally represents a unit of ownership of the underlying company. No, it's not tangible in the "I can touch it" sense - unless you get a LOT of it as you said, but it's backed by hundreds of years of contract law precedent. When I own stock I get quarterly reports on the performance of the company - revenue, profit, etc. - these allow me to evaluate whether I think the company is doing well or poorly and gauge if I want to continue to invest.
Whether the stock pays dividends or not isn't really relevant to my argument. My point is that the price of Bitcoin is completely divorced from any sense of economic "value". There are no earnings to forecast, no revenues to examine. The only way to determine if bitcoin is going to go up or down is gauging sentiment (i.e. groupthink) or just faith. Even sports betting provides more information for decision making like past performance of the athletes.