The problem is that it is considered high in its value. With the high cost of bitcoin, its price may drop at any time due to the occurrence of panic, given its high volatility and susceptibility to negative information
If most people thought that BTC means easy profit without risk they'd all go in, flood the market with money and stabilize it. That's how mature market are acting. Check out oil prices, natural gas, things like that. If you see a move of 10% a year it's a decent run