BTC and any crypto essentially has no fundamentals and no indicators. It's like we can look at the stock and bond markets for things like interest rates, P/E ration, yield curve and a zillion others. Commodities are supply and demand for the most part. BTC just goes up from it's own hot air. You can look at it's record and say that it will keep going up because it's been going up. There's been dips before, but no one can say what triggered it other than a stampede. So long as there's no indicators, there's no negative indicators. So investors are happy.