The core problem is Bitcoins are not a productive asset. They can't produce any cash flows.
Suppose you sell it in six months or sixty years. Then, you can compare USD to USD and say it was a good or bad investment. Alternatively, you could say you wished you had waited a year to buy the stock.
This is important for bitcoin as you have people that buy in and have yet to sell and can’t yet say if they made a good or bad investment for them. However, with dividend stocks you can hit the point where dividends are greater than total investments thus even if nobody ever sells becase it fails the company was still a positive net investment across all investors even if some lost money.
Long story short it’s possible for companies to a net positive investment, it is not possible for Bitcoin to be. If it’s value hits 0$ then you look at all the investments and people spent X buying it, payed Y keeping the network running, and made X - Y selling it which must be less than X.
TLDR: Individials can make money in the lottery, from perymid schemes, or from Bitcoin, but on net they are all poor investments.
Your last statement is interesting because you use the term "money" yet I'm not sure you have questioned the nature of the "money" you are making with your investments. If you imagine yourself in a glass bead economy, and you replace all of your notions of money with glass beads. You are making your investments with glass beads and making net positive glass bead investments from dividends. This is all fine in your glass bead economy. However, the day that the Venetians come with technology to make glass beads, they will subtly buy up all of your wealth because you chose a poor for of money - that you were making so much of with your investments.
https://en.wikipedia.org/wiki/Trade_beads
Alternatively, Bitcoin could be the trade beads (despite the fact they are disinflationary), but the point is the same about the assumptions being confined to the context of a single economy and currency.
That’s the Bitcoin model. If you want to use Bitcoins as your money then it’s even more obvious. If I sell 10 bitcoins to somone they get 9.99999 of them and miners get that .00001 or whatever bitcoin. Wait 1000 years an they are still our that .00001 or whatever coin.
Miners also got coins from the original 2.1 Million but rather than pay people they payed overhead spending electricity and depreciation on hardware. That money is simply gone never to be recovered. Sure, they can sell coins to other people, but that money is new investments.
PS: Bitcoin as a useful service is fine, people lose money to Visa every day but trade that money for other forms of utility.
It’s talk of Bitcoin as an investment that is more troubling. You can make money buying gold or whatever at the right time, but it’s a hedge not an investment. Holding gold has real costs and their is no dividend just the next buyer.
I don’t think it has failed as a medium of exchange though. I used it yesterday as one. That said, it hasn’t filled as niches there, specifically the major ones.
If Bitcoin’s are worth 1 cent each then cash flows in USD can also turn into large Bitcoin cash flows. But, Bitcoin cash flows could not turn into large USD cash flows.
Further, if Bitcoin’s value is dropping at say 15% per year then loaning them out at 10% per year is losing money vs converting them to USD, and doing nothing.